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If birth to amale child and birth to a f...

If birth to amale child and birth to a femal child are equal probable, then what is the probability that at least one of the three children born to a couple is male?

A

`4/5`

B

`7/8`

C

`8/7`

D

`1/2`

Text Solution

Verified by Experts

The correct Answer is:
B
Here `S={BBB,BBG,BGB,GBB,GGB,GBG,BGG,GGG}`
and `E={BBB,BBG,BGB,GBB,GGB,GBG,BGG}`
`:.n(E)=7` and `n(S)=8`
`:.P(E)=(n(E))/(n(S))=7/8`
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