The probability of obtaining an even number on each die,when a pair of dice is rolled is . . . . . . .

When two dice are thrown, the probability of getting a prime number on one die and a composite number on the other is

Two dice are rolled. Then,the probability that the total score is a prime number is

In a random experiment of selecting a ticket from $50$ tickets numbered $00, 01, 02, 03, ..., 47, 49$,if a ticket is selected such that the product of its digits is $0$,what is the probability that the sum of its digits is $8$?

An experiment consists of recording the boy-girl composition of families with $2$ children. What is the sample space if we are interested in knowing whether it is a boy or girl in the order of their births?

Two fair dice are thrown simultaneously. The probability of getting the same number on both dice is $......$.