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Grade 12Magical Mathematics[Interesting Approach]

I am little bit confused in a question that If there are two Children in a family then probability that both are boys What Should be its Ans can anyone please explain

Sagar Rangari

10 Years agoGrade 12

2 Answers

Devesh Paliwal

10 Years ago

Here, Sample Space = {B-B, B-G, G-G}

so, n(s)=3

Events having both boys= {B-B}

so, n(E)= 1

Thus,

P_E = n(E)/n(S)

P_E = 1/3 Ans.

Devesh Paliwal

10 Years ago

I am Sorry above one is incorrect..

The right one is

Here, Sample Space = {B-B, B-G, G-B, G-G}

so, n(s)=4

Events having both boys= {B-B}

so, n(E)= 1

Thus,

PE = n(E)/n(S)

PE = 1/4 Ans.

This one is correct

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