Krishna
0

Step 1:  Analyse the given question and find the probability that both will have same birthday.

            NOTE:  Number of days in the year = 365

                        Sarada can take birth on any of the 365 days.

              Now in order to have the same birthday hamida should take birth on the

              same day. For example say if sarada birthday is 12 may then hamida

              birthday should be 12 may.


                 So, the number of days when same birth is possible = 1

             Then, the probability that both will have the same birthday = \frac{1}{365}


Step 2: Calculate the probability that both will have different birthdays.

                        

  • Out of the two friends, one girl, say, Sarada's birthday can be any day of the year. Now, Hamida's birthday can also be any day of 365 days in the year. We assume that these 365 outcomes are equally likely.

        

            If Hamida's birthday is different from Sarada's, the number of favourable    

            outcomes for her birthday = 365 - 1 = 364


            Therefore, the probability that both will have different birthdays P (Hamida's birthday is different from Sarada's birthday) = \frac{364}{365}