If the probability distribution of X is : | X | 2 | 3 | 4 | 5 | 6 | |---|---|---|---|---|---| | P(X) | 1/15 | 2/15 | 3/15 | 4/15 | 5/15 | Then variance is equal to : Option 1: 14/3 Option 2: 14/9 Option 3: 14/11 Option 4: 70/3

The answer is '14/9'. View full solution:

CUET Mathematics - If the probability distribution of X is : | X | 2 | 3 | 4 | 5 | 6 | |---|---|---|---|---|---| | P(X) | 1/15 | 2/15 | 3/15 | 4/15 | 5/15 | Then variance is equal to : | PYQs + Solutions

CUET Mathematics 2023 22 May Shift 3

Applied Mathematics

Medium

$\frac{14}{3}$

$\frac{14}{9}$

$\frac{14}{11}$

$\frac{70}{3}$

✅ Correct Option: 2

Related questions:

16 May Shift 1

If the random variable X follows the Poisson distribution such that P[X = k] = P[X = k+1], then the mean value of X is:

15 June Shift 2

A discrete random variable X takes the values 0, 1, 2, 3, 4 and its mean is 1.6. If $P(X=1) = 0.4$ , $P(X=4) = P(X=2)$ and $P(X=3) = 2P(X=2)$ , then $P(X=0)$ is :

15 June Shift 2

Match List - I with List - II.

List - I	List - II
(A) In a binomial distribution, if $n = 10$ , $q = 0.25$ , then its mean is	(I) 12
(B) If the mean of a binomial distribution is 6 and its variance is 3, then p is	(II) 7.5
(C) In a binomial distribution, the probability of getting a success is $\frac{1}{4}$ and the standard distribution is 3, then its mean is	(III) 16
(D) If the mean and variance of a binomial distribution are 4 and 3 respectively, then the number of trials is	(IV) $\frac{1}{2}$

Choose the correct answer from the options given below :

CUET Mathematics 2023 22 May Shift 3 PYQs

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