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One of the best questions in probablity. The anwer is c and not b.I really can’t understand why we are subtracting 2 from 2^6 in the number of choices for birthdays.

One of the best questions in probablity. The anwer is c and not b.I really can’t understand why we are subtracting 2 from 2^6 in the number of choices for birthdays.

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Grade:12th pass

1 Answers

Akshay
185 Points
6 years ago
That is the case when birthdays of 6 people lie in one month.
Question asks to find for “exactly” two months. There may be case when birthdays lie in 1 month, say January for example. 
ATB

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