Aptitude - A father has 8 children ,he takes 3 at a time to a zoo. What is the probability of a child going to

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A father has 8 children ,he takes 3 at a time to a zoo. What is the probability of a child going to the zoo.

Total Answers and Comments: 12

Last Update: August 29, 2007

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April 19, 2005 11:49:55

sandeep

RE: A father has 8 children ,he takes 3 at a time to a zoo. What is the probability of a child going to ...

the probability is 1/8

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May 17, 2005 00:40:35

Ashutosh Joshi

RE: A father has 8 children ,he takes 3 at a time to a zoo. What is the probability of a child going to ...

3/8

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July 05, 2005 01:06:45

Amit

RE: A father has 8 children ,he takes 3 at a time to a zoo. What is the probability of a child going to ...

3/8

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July 29, 2005 23:11:02

KIRAN

RE: A father has 8 children ,he takes 3 at a time to a zoo. What is the probability of a child going to ...

3/8

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September 23, 2005 11:55:40

priya

RE: A father has 8 children ,he takes 3 at a time to a...

n(s)=8c3=56

n(E)=8c1=8

so probability=n(E)/n(s)=8/56

=1/7

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February 28, 2006 05:37:07

rohith

RE: A father has 8 children ,he takes 3 at a time to a...

3:3:2

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March 23, 2006 16:18:08

mtgeek

RE: A father has 8 children ,he takes 3 at a time to a...

Probabality has to be 3/8, because his father picks 3 out of 8 to go to the zoo. You have a chance of 3 out of 8 to be in that group.

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June 19, 2007 23:36:22

Vivekanand

RE: A father has 8 children ,he takes 3 at a time to a...

The question is that one child getting selected by his father. So probability of selecting this guy is 1/8 and there are remaining 2 positions, for which he would pick by 8C2. The total no.of combinations are 8C3. So the probability is

             1/8 * 8C2            1/8 * 8*7/2
            --------------    =    --------------------   =    1/16 = 0.066
                8C3                     8*7*6/3*2*1

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