Find the value of P(X ≥ 1)

Category: QuestionsFind the value of P(X ≥ 1)
Editor">Editor Staff asked 11 months ago

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
NCERT Solutions for Subject Clas 12 Math Select the correct answer from above options 
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1 Answers
Editor">Editor Staff answered 11 months ago

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