A. 1

B. 2

C. 5

D.

Solution:

B. 2

Explanation:

A dice with the numbers 1 on three faces, 2 on two faces, and 5 on one face is given. Let represent a random variable that represents a number on a die.

Then can have any value between 1 and 5.

There are a total of six numbers.

Now

herefore

xpectation of

Now by substituting the values we get

As a result, the correct answer is (B).