The probability that two boys do not have the same birthday is 0.897. What is the probability that the two boys have the same birthday ?

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?

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?

What is the probability that in a group of (i)2 people, both will have the same birth-day? (ii)3 people, at least two will have the same birth-day? Assuming that there are 365 days in a year and no one has his/her birth day on 29th February.

Two friend were born in the same year, what is the probability that they have : (i) same birthday (ii) different birthday.

A and B are friends. Ignoring the leap year, find the probability that both friends will have the same birthday.

If a person visits his dentist, suppose the probability that he will have his teeth cleaned is 0.48, the probability that he will have cavity filled is 0.25, probability that he will have a tooth extracted is 0.20, the probability that he will have teeth cleaned and cavity filled is 0.09, the probability that he will have his teeth cleaned and a tooth extracted is 0.12, the probability that he will have as cavity filled and tooth extracted is 0.07, and the probability that he will have his teeth cleaned, cavity filled , and tooth extracted s 0.03. What is the probability that a person visiting his dentist will have at least one of these things done to him?

The probability that a patient visiting a dentist will have a tooth extract is 0.06, the probability that he will have a cavity filled is 0.2 and the probability that he will have a tooth extracted as well as cavity filled is 0.03. what is the probability of that a patient has either a tooth extracted or a cavity filled?

There are two children in a family. Find the probability that at most one boy is there in the family.

Four letters mailed today each have a (1)/(3) probability of arriving in two days sooner. What is the probability that exactly two of the the four letters will arrive in two days or sooner ?

A family has three children.Assuming that the probability of having a boy is 0.5, what is the probability that at least one child is a boy?