**Probability ncert solutions Chapter 15 Exercise 15.1 Question 7**

**7.** It is given that in a group of 3 students, the probability of 2 students not having the same birthday is 0.992. What is the probability that the 2 students have the same birthday?

**Solution:**

Let E be the event that 2 students do not have the same birthday.

It is given that P(E)=0.992

We have {where is probability of not happening of event E or we can say that it is the probability of 2 students having the same birthday.}

**Therefore, Probability of 2 students having the same birthday=0.008**