Maths-

General

Easy

Question

# A random variable X has the following distribution

The value of and P(X<3) are equal to

Hint:

**Sum of all probabilities is 1**

## The correct answer is:

### Given :

Sum of all probabilities is 1

P(x=1) + P(x = 2) + P(x = 3) + P(x =4) = 1

k + 2k + 3k + 4k = 1

k =

Now, P(x < 3) = P(x=1) + P(x =3)

P(x < 3) = k + 2k = 3k =

Thus, the value of is and P(X<3) is

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