Question

Savita and Hamida are friends. What is the probability that both will have (i) different birthday? (ii) the same birthday?​​

Answer 1

Explanation:

Out of the two friends, one girl, say, Savita’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. (i) If Hamida’s birthday is different from Savita’s, the number of favourable outcomes for her birthday is 365 – 1 = 364 So, P (Hamida’s birthday is different from Savita’s birthday) =364/365 (ii) P(Savita and Hamida have the same birthday)