Latest Infosys Aptitude Question SOLUTION: Q. How many arrangements can be made if there are 5 balls from which 3 are red, 1 is green, 1 is yellow. find the probability of getting all 3?

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Q. How many arrangements can be made if there are 5 balls from which 3 are red, 1 is green, 1 is yellow. find the probability of getting all 3?

Asked In Infosys (11 years ago)

Solved T G Read Solution (11)

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Read Solution (11) :

T G  (11 years ago)

arrangement = 5!/3!=20
Probability of getting all 3 balls=
3 from 5=5c3
1 from 3 red ball,1 green,1 yellow
(3c1*1c1*1c1)/5c3 =3/10
is the 2nd ans 3/10????

Is this solution Helpfull? Yes (37) | No (2)  

ASHISH KATIYAR  (11 years ago)

total no of arrangments ::

(considering arrangment of all 5 balls)
5 balls can be arranged in !5 but 3 are of same in color so 5!/3!=20

probability part ::

(considering probability of getting all 3 red balls)
since p=favorable cases/total cases
so probability of getting all 3 red balls is 1 (favorable)
and total cases will be selecting any 3 balls out of 5 ie 5C3
hence p=1/5C3 = 1/10

Is this solution Helpfull? Yes (11) | No (2)  

Anwesa Roy  (10 years ago)

Arrangement = 5!/3! = 20
P(All colour) = (3C1*1C1*1C1)/5C3 =3/10

Is this solution Helpfull? Yes (5) | No   

Shilpi Jaisawal  (11 years ago)

3/10 will be the answer

Is this solution Helpfull? Yes (2) | No   

GAURAV KUMAR  (11 years ago)

tanushree ghosh...........u know .....the value of 1c1 ....infinity

Is this solution Helpfull? Yes (1) | No (15)  

Durga Prasad  (10 years ago)

total number of arrangements = 5c5

prob of gettn all 3 = 5c3

5c5/5c3=1/10 answer is 1/10

Is this solution Helpfull? Yes (1) | No   

UGAN JHA  (11 years ago)

9
3c1*1*1*3

Is this solution Helpfull? Yes | No (5)  

abhinav srivastava  (11 years ago)

arrangements will be 60
and probability will be 3/5

Is this solution Helpfull? Yes | No (7)  

Debu  (11 years ago)

value of 1C1 is infinity?? :O :O from when ??

Is this solution Helpfull? Yes | No (4)  

AKHILESH  (10 years ago)

question toh thik likho...

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KONDURU MAHESH  (10 years ago)

5!/3!=20
out of 5,3 r similar

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