A random variable X takes values 0,1,2 with probabilities 0.3,0.5,0.2. The expected value E(X) is: MCQ with Answer and Explanation

A random variable X takes values 0,1,2 with probabilities 0.3,0.5,0.2. The expected value E(X) is:
A. 0.8
B. 0.9
C. 1.1
D. 1.0
Answer: Option B
Solution (By JKSSB Mock Tests)
E(X) = 0×0.3 + 1×0.5 + 2×0.2 = 0 + 0.5 + 0.4 = 0.9.

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