Question

sarada and hamida are friends ?what is the probability that both will have 1) different birthdays? 2) same birthday?​

Answer 1

1. probability of different birthday= 1/2
2. probability of same birthday= 2/2= 1

Answer 2

Good Question :-

First we see that the probability that sarada is born at a particular day in a year = 365/365 , which is 100% .

Then probability that hamida is born on sarada's birthday = 1/365 , which is

0.0027% (approximately).

Multiplying both, we get probability that both the friends have the same birthday :-

=> $\frac{365}{365} * \frac{1}{365}$

=> 0.0027 %

Since we know the probability that both of them have the same birthday , probability where both the friends have different birthdays will be :-

(100 - 0.0027)%

=> 99.9973%