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Magical Mathematics[Interesting Approach]

)One person has 2 child.At least one of them was a girl.Then the Probability that 2 of the are girl is_____ a)1/2 b)1/4 c)0.36 d)1

sandhiya murali

14 Years agoGrade

1 Answer

Ashwin Muralidharan IIT Madras

14 Years ago

Hi Sandhya,

It is already given that one of then is a girl.

G=Girl

B=Boy.

So possibilties are GB,GG.

Out of which GG is the favourable case. So ans = 1/2 Option (A).

Best Regards,

Ashwin (IIT Madras).

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