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 4 students, the probability of 2 students not having the same birthday is 0.893 . What is the probability that the 2 students have the same birthday?

The probability that a student is not a swimmer is (1)/(5) Then the probability that out of five students, four are swimmers is

A problem is given to three students A,B,C then probability of solving is 0.6,0.5 and 0.7 respectively. What is the probability that is solved:

Savita and Hamida are friends . What is the probability that both will have the same birth day ? ( ignoring a leap year )

In answering a question on a multiple choice test, a student either knows the answer or guesses. Let 3/4 be the probability that he knows the answer and 1/4 be the probability that he guesses. Assuming that a student who guesses at the answer will be correct with probability 1/4 . What is the probability that the student knows the answer given that he answered it correctly ?

Two thirds of students in a class are boys and rest girls.It is known that the probability of a girl getting a first grade is 0.85 and that of boys is 0.70. Find the probability that a student chosen at random will get first grade marks.

Two thirds of students in a class are boys and rest girls. It is known that the probability of a girls. It is known that the probability of a girl getting a first grade is 0.85 and that of boys is 0.70. Find the probability that a student chosen at random will get first grade marks.

The probability that a student will score centum in mathematics is 4/5 . The probability that he will not score centum is ………………… .