# In a family of 3, the probability of having at least one boy is

2
by Deleted account

2016-02-06T19:46:35+05:30
In a family,there will be a father,mother and a child.The child's may be a girl or a boy.So,the probability of having at least one boy in a family is 1/3 .
but the options are 7/8, 1/8, 5/8, 3/4
Sorry...
for what
I haven't got the correct answer..
koi baat nahi seriously mat lo
2016-02-06T19:46:39+05:30

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7/8 is the probability of having at least one boy

at least 1 boy = 1 - p(none boy )

s = {BBB BBG BGG GGG GGB GBB BGB GBG }

P(at least one boy)=1 - P(none)

= 1 - ( GGG)

= 1- 1/8

= 7/8
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koi baat nahi seriously mat lo