There is a bag of 10 sweets, in the bag, there are 5 purple sweets, 1 yellow sweet, 2 blue sweets and 2 red sweets.A person picks one sweet from the bag, what is the probability that this person will get a purple sweet?
Total no. of sweets= 5+2+1+2 =10 P(getting a purple sweet)=5/10 =1/2
Q: There are 2 red pens, 3 black pens and 1 blue pen in a bag. The pens are identical except for their colour. A pen is randomly drawn from the bag. Find the probability that the pen is red.
There is a bag of 20 country erasers, there are, 4 Singapore erasers, 3 Canada erasers, 1 Malaysia eraser, 2 Germany erasers, 5 England erasrs, 2 Thailand erasers and 3 Indonesia erasers.
Find the probability of getting Singapore erasers?
Probability of getting Singapore erasers = 4/20=1/5
There are 15 vampires in the cemetery. 11 red in colour, 3 purple in colour and one green in colour. Only one vampire attacks per human being. When annie goes to the cemetery, what is the probility of her gettin attacked by a purple vampire?
Ans: P(getting attacked by a purple vampire)= 3/15 = 1/5
There are a total of 9 coloured hairbands. There are 4 purple, 4 green and 1 red hairband altogether. (i) What is the probability of getting the purple-coloured hairband? (ii) What is the probability of getting the red or black hairband? (iii) What is the probability of getting the orange and purple hairband?
Solutions: (i) P(getting purple-coloured hairband)= 4/9 (ii) P(getting a red or black hairband)= 1/9 (iii) P(getting the orange and purple hairband)=0/9 =0
A pet shop consists of 2 dogs, 3 cats, 5 hamsters and 1 bird.
What is the probability of the following : a) A dog running out of the shop? 1/11 b) 2 cats running out of the shop? 2/11 c) A gerbil running out of the shop? 0 d) A cat and 2 hamster running out of the shop? 3/11 e) A dog or a bird running out of the shop? 2/11
There are 5 doors that are identical. There are 2 doors that has sheep behind it. There is 1 door that has a pot of gold behind it. The other 2 doors have nothing behind it. What is the probability of getting the pot of gold with only one try to open the door?
P(getting sheep) = 2/5 P(getting pot of gold) = 1/5 P(getting nothing) = 2/5 P(getting a lump of coal) = 0
Sally took part in the lucky draw, with 1 000 people including her taking part in it. There are only four prizes, which are all Honda cars. What is the probability of Sally getting the car?
A bag of soft toy contains 3 rilakkumas, 4 domo-kuns and 2 elmos and a bugs bunny. If a toy is randomly picked from the bag, find the probability of getting: a) a cookie monster, b) a domo-kun. _______________________________________________
a)P(getting a cookie monster)= 0 b)P(getting a domo-kun)= 4/10 = 2/5
A bag of potato chip contains 10 chips, of which 4 are burnt, 2 are yellow in colour, and 4 are brown in colour. If I were to pick a potato chip inside the bag, what is the probability of me getting a
a)burnt potato chip?
P(getting a burnt potato chip)=4/10 = 2/5
b)green potato chip?
P(getting a green potato chip)=0/10 =0
c) yellow or brown potato chip?
P(getting a yellow and brown potato chip)=6/10 = 3/5
d) brown or burnt potato chip?
P(getting a burnt or brown potato chip)= 8/10 =4/5
Nicky is walking home from her bus stops. She comes to a 3-way split. Out of the 3 routes, 2 passes by a neighbour older than her. What is the probability of her meeting a neighbour younger than her?
On a lawn there are only 2 toy cars, 5 toy trucks, and 3 toy motorcycles. Nothing else is on the lawn. Blindfolded, a toddler goes across the lawn and knocks against something.
What is the probability that the toddler has knocked against a toy motorcycle?
In a cave, 3 lamps contain a green genie each, 2 lamp contain a blue genie each and 4 lamps contain a red genie each. The other 6 are empty lamps. A boy comes to the cave but is only allowed to take ONE lamp.
What is the probability that he will get the blue genie?
Total number of lamps=3+2+4+6 =15 Number of lamps with the blue genie=2 P(getting a blue genie) =2/15
There is a bunch of bananas - 2 green bananas, 5 yellow bananas and 3 rotten bananas. A monkey who is blindfolded came along. What is the probability of the monkey getting a rotten banana?
Sally goes to an all-girls school consisting of 400 students alltogether. 120 Sec ones, 130 Sec twos, 76 sec threes and 74 sec fours. What is the probibility of bumping into a sec one student in the school?
P ( bumping into a sec one student) = 120/400 = 3/10
Jolin has a pack of cards. What is the probability of her getting a black picture card? Number of black picture cards=6 P(getting a black picture card)=6/52 =3/26
There is a bag of underwears. 2 blue underwears, 3 black underwears and 6 poka dots underwears. If I were to pick a underwear inside the bag, what is the probability of me getting a poka dots underwear?
There is a pack of chocolates of various shapes in it. the shapes are: 5 circle, 4 shells and 6 hearts and 10 triangle. a) If my friend picks a chocolate, what is the probabilty of her getting a diamond shape? b) what is the probability of getting a heart or a diamond shape? c)what is the probability of getting shell, hearts and diamond shape? a)There is no diamond shape chocolate. hence p(diomand shape)=0 b)p(diomand or heart shape)=6/25 c)p(heart, circle, triangle, shells)=25/25 =1
in a bag of sweets,there are 4 red ones, 5 yellow ones and 3 blue ones. From a random pick, you were asked to guess the colour of the sweet. Would you choose red or blue?
P(getting red sweet) = 1/3 P(getting blue sweet)= 1/4 therefore, the probabilty of getting red is higher.
In a zoo, there are 4 monkeys with red butts, 1 brown monkey and 10 monkeys with strips.
ReplyDeleteFind the probaility of seeing monkeys with red butts?
Total number of monkeys=4+1+10=15
probaility of seeing monkeys with red butts =4/15
If there are 5 spoilt computers in a room with 42 computers, what is the probability of me picking a spoilt one?
ReplyDelete-Aralin and Adlina
There is a bag of 10 sweets, in the bag, there are 5 purple sweets, 1 yellow sweet, 2 blue sweets and 2 red sweets.A person picks one sweet from the bag, what is the probability that this person will get a purple sweet?
ReplyDeleteTotal no. of sweets= 5+2+1+2
=10
P(getting a purple sweet)=5/10
=1/2
Q: There are 2 red pens, 3 black pens and 1 blue pen in a bag. The pens are identical except for their colour. A pen is randomly drawn from the bag. Find the probability that the pen is red.
ReplyDeleteAns: p(pen is red)= 2/6 = 1/3
Sorry, the answer to the question posted is 5/42.
ReplyDelete-Adlina and Aralin
State the probability of who you are going to see today.
ReplyDeleteP(seeing my mum and sis today) = 0/5
P(seeing Abby today) = 0/5
P(seeing the doctor today) = 5/5
P(seeing my primary school friends today)= 0/5
P(seeing Nooranah today) = 0/5
Mary throws a coin in the air and catch it. What is the probability of her getting heads.
ReplyDeleteA coin has 2 sides.
P(getting heads) = 1 - 1/2
= 1/2
There is a bag of 20 country erasers, there are, 4 Singapore erasers, 3 Canada erasers, 1 Malaysia eraser, 2 Germany erasers, 5 England erasrs, 2 Thailand erasers and 3 Indonesia erasers.
ReplyDeleteFind the probability of getting Singapore erasers?
Probability of getting Singapore erasers = 4/20=1/5
There are 15 vampires in the cemetery. 11 red in colour, 3 purple in colour and one green in colour. Only one vampire attacks per human being.
ReplyDeleteWhen annie goes to the cemetery, what is the probility of her gettin attacked by a purple vampire?
Ans: P(getting attacked by a purple vampire)= 3/15 = 1/5
There are 7 pears,5 apples and 3 oranges in a bag.The shopkeeper removes 1 fruit.What is the probability that the fruit removed was an apple?
ReplyDeleteP(getting an apple)=5/15 = 1/3
There are a total of 9 coloured hairbands.
ReplyDeleteThere are 4 purple, 4 green and 1 red hairband altogether.
(i) What is the probability of getting the purple-coloured hairband?
(ii) What is the probability of getting the red or black hairband?
(iii) What is the probability of getting the orange and purple hairband?
Solutions:
(i) P(getting purple-coloured hairband)= 4/9
(ii) P(getting a red or black hairband)= 1/9
(iii) P(getting the orange and purple hairband)=0/9 =0
IN NTUC, there are ice-cream flavours of 3 vanilla, 5 chocolate and 2 green tea.
ReplyDeleteFind the probability of having green tea ice cream?
3+5+2=11=
probability of having green tea ice cream=2/11
A pet shop consists of 2 dogs, 3 cats, 5 hamsters and 1 bird.
ReplyDeleteWhat is the probability of the following :
a) A dog running out of the shop? 1/11
b) 2 cats running out of the shop? 2/11
c) A gerbil running out of the shop? 0
d) A cat and 2 hamster running out of the shop? 3/11
e) A dog or a bird running out of the shop? 2/11
There are 5 doors that are identical. There are 2 doors that has sheep behind it. There is 1 door that has a pot of gold behind it. The other 2 doors have nothing behind it. What is the probability of getting the pot of gold with only one try to open the door?
ReplyDeleteP(getting sheep) = 2/5
P(getting pot of gold) = 1/5
P(getting nothing) = 2/5
P(getting a lump of coal) = 0
Sally took part in the lucky draw, with 1 000 people including her taking part in it. There are only four prizes, which are all Honda cars. What is the probability of Sally getting the car?
ReplyDelete4/1000 = 2/500 = 1/250
huiyi and kexin
There are 3 red balls, 4 green balls and 2 yellow balls in a bag. A ball is picked randomly. Find the probability of picking a green ball.
ReplyDeleteP(getting a green ball)= 4/9
A bag of soft toy contains 3 rilakkumas, 4 domo-kuns and 2 elmos and a bugs bunny. If a toy is randomly picked from the bag, find the probability of getting:
ReplyDeletea) a cookie monster,
b) a domo-kun.
_______________________________________________
a)P(getting a cookie monster)= 0
b)P(getting a domo-kun)= 4/10
= 2/5
A bag of potato chip contains 10 chips, of which 4 are burnt, 2 are yellow in colour, and 4 are brown in colour.
ReplyDeleteIf I were to pick a potato chip inside the bag, what is the probability of me getting a
a)burnt potato chip?
P(getting a burnt potato chip)=4/10
= 2/5
b)green potato chip?
P(getting a green potato chip)=0/10
=0
c) yellow or brown potato chip?
P(getting a yellow and brown potato chip)=6/10
= 3/5
d) brown or burnt potato chip?
P(getting a burnt or brown potato chip)= 8/10
=4/5
Nicky is walking home from her bus stops. She comes to a 3-way split. Out of the 3 routes, 2 passes by a neighbour older than her. What is the probability of her meeting a neighbour younger than her?
ReplyDeleteAnswer:
P(meeting a younger neighbour) = 1/3
On a lawn there are only 2 toy cars, 5 toy trucks, and 3 toy motorcycles. Nothing else is on the lawn. Blindfolded, a toddler goes across the lawn and knocks against something.
ReplyDeleteWhat is the probability that the toddler has knocked against a toy motorcycle?
P(Knocking against a toy motorcycle) = 3/10
There are 5 blue, 4 orange, 3 red and 2 green sweets in a bag. The sweets are identical except for their colour.
ReplyDeleteFind the probability of getting an orange or green sweet.
P(Getting an orange OR green sweet) = 6/14
= 3/7
In a cave, 3 lamps contain a green genie each, 2 lamp contain a blue genie each and 4 lamps contain a red genie each. The other 6 are empty lamps.
ReplyDeleteA boy comes to the cave but is only allowed to take ONE lamp.
What is the probability that he will get the blue genie?
Total number of lamps=3+2+4+6
=15
Number of lamps with the blue genie=2
P(getting a blue genie) =2/15
There are 4 red fruits, 5 green fruits and 1 yellow fruit. A fruit is picked randomly from the bag, find the probability that the fruit is yellow.
ReplyDeleteTotal number of fruits = 5+4+1
= 10
P(getting a yellow fruit) = 1/10
There is a bunch of bananas - 2 green bananas, 5 yellow bananas and 3 rotten bananas. A monkey who is blindfolded came along. What is the probability of the monkey getting a rotten banana?
ReplyDeleteP(getting a rotten banana) = 3/10
Sally goes to an all-girls school consisting of 400 students alltogether. 120 Sec ones, 130 Sec twos, 76 sec threes and 74 sec fours. What is the probibility of bumping into a sec one student in the school?
ReplyDeleteP ( bumping into a sec one student)
= 120/400
= 3/10
An apple is cut into 6 pieces. There is a worm in one of the 6. What is the probability that Cassie will eat the worm?????
ReplyDeleteP (Cassie eating the worm)= 1/6
Jolin has a pack of cards. What is the probability of her getting a black picture card?
ReplyDeleteNumber of black picture cards=6
P(getting a black picture card)=6/52 =3/26
There are 15 birds in a tree.
ReplyDelete4 are red birds, 5 are blue birds, 1 is a yellow bird and 5 are purple birds.
Yoyo went to rest under the tree and heard birds(s) chirping.
What is the probablity that Yoyo heard red birds chirping?
P(Getting a red bird) = 4/15
adding on...
ReplyDeletethe chances of Sally not geting the car is: 1000 - 4 = 996
probability of sally not getting the car = 996/1000 = 498/500 = 249/250
there are 4 green beads, 6 red beads and 3 yellow beads in a box
ReplyDeletewhat is the probability of getting a red bead?
P(getting a red bead)= 6/13
There is a bag of underwears. 2 blue underwears, 3 black underwears and 6 poka dots underwears.
ReplyDeleteIf I were to pick a underwear inside the bag, what is the probability of me getting a poka dots underwear?
total no. of underwear=3+2+6=11
p( getting a poka dots underwear )=6/11
There is a pack of chocolates of various shapes in it. the shapes are: 5 circle, 4 shells and 6 hearts and 10 triangle.
ReplyDeletea) If my friend picks a chocolate, what is the probabilty of her getting a diamond shape?
b) what is the probability of getting a heart or a diamond shape?
c)what is the probability of getting shell, hearts and diamond shape?
a)There is no diamond shape chocolate. hence
p(diomand shape)=0
b)p(diomand or heart shape)=6/25
c)p(heart, circle, triangle, shells)=25/25
=1
in a bag of sweets,there are 4 red ones, 5 yellow ones and 3 blue ones. From a random pick, you were asked to guess the colour of the sweet. Would you choose red or blue?
ReplyDeleteP(getting red sweet) = 1/3
P(getting blue sweet)= 1/4
therefore, the probabilty of getting red is higher.