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Questions › CUET-PG › CUET-PG 2025 › Q20
4 marks, −1Statistics › Random variables and standard distributions › Expectation and varianceEasyabout 1 min

CUET-PG 2025 Question 20: Random variables and standard distributions

Suppose that the random variable X takes on the values: -1, 0, and 2 with probability 18,12\frac{1}{8}, \frac{1}{2}81​,21​ and 38\frac{3}{8}83​. Find the expected value of X.

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Suppose that the random variable X takes on the values: -1, 0, and 2 with probability 1/8, 1/2 and 3/8. Find the expected value of X. (A) 6/8 (B) 5/8 (C) 7/8 (D) 1

Random variables and standard distributions has come up 173 times in 7 exams since 2005.

What this question tests

This question is on Expectation and variance, part of Random variables and standard distributions in Statistics.

The mean and spread of a random variable, and how they change under transformations and sums.

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