CUET Mathematics - Two dice are thrown simultaneously. If X denotes the number of fours, then the expectation of X will be : | PYQs + Solutions

CUET Mathematics

Algebra

Medium

common

$\frac{5}{9}$

$\frac{1}{3}$

$\frac{4}{7}$

$\frac{3}{8}$

✅ Correct Option: 2

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Let $F(z)$ be the cumulative density function of the standard normal variate $z$ , then which of the following are correct?

(A) $F(z) = \frac{1}{\sqrt{2\pi}} \int_{-\infty}^z e^{-\frac{z^2}{2}} dz$ , $-\infty < z < \infty$

(B) $F(-z) = 1 - F(z)$

(D) $F(\infty) = 1$

Choose the correct answer from the options given below:

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Let X denotes the number of hours a person uses a mobile and the probability distribution of X is as

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The standard deviation of the number of tails in three tosses of a coin is:

CUET Mathematics PYQs