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

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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. 1.0

C. 1.1

D. 0.9

Answer: Option D

Solution (By JKSSB Mock Tests)

E(X) = 0×0.3 + 1×0.5 + 2×0.2 = 0 + 0.5 + 0.4 = 0.9.

This question belongs to: Accountancy and Statistics Statistics

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Which measure of central tendency is not affected by extreme values?

A. Arithmetic mean

B. Geometric mean

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Correct Answer: Option C

Explanation:
The median depends only on the middle value(s) and is resistant to outliers.

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Correct Answer: Option A

Explanation:
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The condition (A) ≥ (AB) is necessary for:

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Correct Answer: Option A

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