Question

The mean of the numbers obtained on throwing a die having written 1 on three faces, 2 on two faces and 5 on one face is

A) 1

(B) 2

(C) 5

(D) 8/3

Answer 1

Let X be the random variable representing a number on the die.

The total number of observations is six.

Therefore, the probability distribution is as follows.

X	1	2	5
P(X)	1/2	1/3	1/6