Q79 / 160 · AP EAMCET 2017 (26 Apr Shift 2) · Mathematics

The probability distribution of a random variable $\mathrm{X}$ is
Then the standard deviation of $\mathrm{X}$ is

A
1
Correct answer
B
2
C
4
D
7

Hence, the correct answer is option: 'B'.

Relevant Questions

Let X be the random variable taking values for a fixed positive integer n. If for , then the variance of X is27 May, 2025 (M)Random Variable and its Probability Distribution
The probability distribution of a random variable X is as follows. Then the mean of X is26 May, 2025 (M)Random Variable and its Probability Distribution
If the probability distribution of a random variable X is as follows, then the mean of X is24 May, 2025 (M)Random Variable and its Probability Distribution
The probability distribution of a discrete random variable X is given below X = x -1 0 1 2 P(X = x) Then the value of \(6 ( {x}^2 ) {P}( {X}23 May, 2025 (M)Random Variable and its Probability Distribution
The mean and variance of a binomial distrbution are and 5 respectively. If is an integer, then the possible values for are23 May, 2025 (E)Random Variable and its Probability Distribution
If the probability distribution of a random variable is as follows, then 0 1 2 3 4 3K 5K22 May, 2025 (M)Random Variable and its Probability Distribution