1) What is the probability that two people have same birthday ?

2) What is the probability that two people have different birthday ?

Let A denote the event that two people have the same birthday.

denote the event that two people have different birthday.

Total number of days in year = 365

If two people have the same birthday, then their birthday could be on any one of the day from 365 days of the year.

∴ Number of cases in favour of event A = 1

Required probability,

We know that, P (A) + P = 1

Probability that two people have the same birthday =

Probability that two people have the same birthday =

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