Maths-

General

Easy

Question

# A random variable has the following distribution.

Then for the values, A = K, B = Mean, C = Variance, the ascending order is

- A, B, C
- B, A, C
- C, B, A
- C, A, B

Hint:

### In probability, sum of all the events = 1 and

and

## The correct answer is: B, A, C

### Given :

In probability, sum of all the events = 1

0.1 + 2K + 3K + 7K + 0.2 + 0.1 = 1

12K + 0.4 = 1

12K = 0.6

K = = 0.05

Find mean by substituting values from the table and adding

Find variance by substituting values from the table and adding

-0.25 < 0.5<2.0375

Thus, B < A<C

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