Question

The probability that the birthdays of 4 different persons will fall in exactly two calendar months is:

Answer 1

Now every person can be in either of the 2 months.

As there are 4 people there are 2^4=16 possibilities.

We then need to subtract 2 cases (this is so because either their birthdays are all in one month or the other).

This leaves us with 16-2=14 possible cases.

hence, the correct answer is 14.

Hope it helps

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