Two balanced dice are rolled. Find the probability that the numbers on two dice are equal.

Someone is asked to take a number from $1$ to $100$. The probability that it is a prime number is

There are $5$ white,$7$ red,$4$ black and $2$ blue identical balls in a box. One ball is selected at random from the box. Find the probability that the ball is not blue.

Total number of outcomes in the experiment of tossing an unbiased coin twice is ..........

An unbiased coin is tossed thrice. The probability of receiving two heads is ..........

Two unbiased dice are thrown once. Write all the possible outcomes of this experiment. What is the probability that the sum of numbers on two dice is greater than $9$?