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In a family of 3 children, find the prob...

In a family of 3 children, find the probability of having at least one boy.

Text Solution

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The correct Answer is:
` 7/8`
All possible outcomes are BBB, BBG,BGB, GBB,BGG,GBG, GGB, GGG.
Number of all possible outcomes = 8.
Let E be the event of having at least one boy.
Then, E contains GGB, GBG, BGG,BBG,BGB,GBB,BBB.
Number of cases favourable to E = 7.
` :. ` required probability ` P(E ) = 7/8`.
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