Question

An urn contains 5 red and 2 black balls. Two balls are randomly drawn. Let X represents the number of black balls. What are the possible values of X? Is X a random variable?

Answer 1

Ans-

Given that an urn has 5 Red balls and 2 Black balls.

The number of ways in which two balls can be represented are {(RR), (RB), (BR), (BB)}

Let X represent the number of black balls. Possible values of X are: X (RR) = 0, X (RB) = 1, X(BR = 1) and X (BB) = 2.

Therefore the possible values of X are 0, 1 and 2.