Let a pair of dice be thrown and the random variable X be the sum of the numbers that appear on the two dice. Find the mean or expectation of X.

Let a pair of dice be thrown and the random variable X be the sum of the numbers that appear on the two dice. Find variance of X.

A pair of dice is thrown and the random variable X is defined as the sum of numbers that appear on the two dice. Find the mean or expectation of X.

Let a pair of dice be thrown and the random variable X be the sum of the numbers that appear on the two dice. Write the probability distribution of X.

Let a pair of dice he rolled thrice and the random variable X be the number of doublets. Find the mean of the random variable.

Let a pair of dice he rolled thrice and the random variable X be the number of doublets. Find the mean of the random variable.

Two dice thrown at random find the probability that the sum of the numbers thrown is 7.

Two dice thrown at random find the probabilty that the sum of the numbers thrown is 11.