CUET Mathematics - Let X be a discrete random variable and probability distribution X is | X | -1 | 0 | 1 | |---|---|---|---| | P(X) | 1/2 | 1/5 | 3/10 | Then E(X) is equal to : | PYQs + Solutions

CUET Mathematics 2022 7 Aug Shift 2

Algebra

Easy

$-\frac{1}{5}$

$\frac{1}{5}$

✅ Correct Option: 2

Related questions:

22 May Shift 2

The random variable X can take values 0, 1, 2. If $P(X=0)=P(X=1)=\alpha$ , and $E(X^2)=E(X)$ , then which of the following are correct?

(A) $E(X) = 2-3\alpha$

(B) $E(X^2) = 4+7\alpha$

(D) $\alpha = \frac{1}{5}$

Choose the correct answer from the options given below:

21 May Shift 2

Let A and B be independent events such that P (A) = 0.3 and P (B) = 0.4, then

Match List-I with List-II

List-I	List-II
(A) $P(A \cap B)$	(I) 0.3
(B) $P(A \cup B)$	(II) 0.4
(C) $P(A \mid B)$	(III) 0.12
(D) $P(B \mid A)$	(IV) 0.58

Choose the correct answer from the options given below:

14 May Shift 2

An urn I contains 3 white and 4 blue balls, while urn II contains 5 white and 6 blue balls. One ball is drawn at random from one of the urns and it is found to be white. The probability that it was drawn from urn II is

CUET Mathematics 2022 7 Aug Shift 2 PYQs

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