Question

Find the value of P(X ≥ 1)

(a) 5/7

(b) 7/8

(c) 3/8

(d) 8/9

This question was addressed to me by my school teacher while I was bunking the class.

I need to ask this question from Random Variables and its Probability Distributions in chapter Probability of Mathematics – Class 12

Answer 1

Correct option is (b) 7/8

Easy explanation: P(X ≥ 1) = P(X=1) + P(X=2) + P(X=3)

= 1/2 + 1/8 + 1/4

= 7/8