Weird Probability

Probability Level 3

A family has two children.

One of them is a boy.

What is the probability that the other one is a boy.

1/4 1/3 2/3 1/2

Nicholas Patrick by Nicholas Patrick , 21, Indonesia

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1 solution

Nicholas Patrick
Jan 19, 2015

Possibilities

BB

BG

GB

GG

The combination will not be GG

So, that gives us 1/3

0 Helpful 0 Interesting 0 Brilliant 0 Confused

if we don't consider the order , possibilities are BB, BG (BG OR GB ,ITS KIND OF SAME ), GG as GG is not possible so, that gives 1/2 , only case of BB .

Manu Attri - 6 years ago

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We should consider it different because
1. They are different people
2. The outcomes would have different probabilities (one boy one girl is much more likely than two boys)

Nicholas Patrick - 5 years, 11 months ago

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