CUET Mathematics - The probability distribution of a discrete random variable X is given by : | X | 30 | 10 | -10 | |---|---|---|---| | P(X) | 1/5 | 3/10 | 1/2 | then E(X) is equals to | PYQs + Solutions

CUET Mathematics 2023 11 Aug Shift 1

Applied Mathematics

Easy

-6

✅ Correct Option: 2

Related questions:

23 May Shift 3

A shopkeeper wants to check the average number of cars sold per call. Past record of sales is shown below:

Sale of cars (Units)	0	1	2	3
Probabilities	$\frac{1}{6}$	$\frac{1}{2}$	$\frac{3}{10}$	$\frac{1}{30}$

The expected number of cars sold is :

25 May Shift 1

If the probability distribution of a random variable X is given as

$x_i$	0	1	2	3
$p_i$	$2k^2$	$k^2$	$3k^2$	$k$

Then the mean of X is

15 June Shift 2

A telephone exchange receives on an average 5 calls per minute. The probability of receiving 3 or less calls per minute is :

CUET Mathematics 2023 11 Aug Shift 1 PYQs