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Let the p.m.f. of a random variable X be...

Let the p.m.f. of a random variable X be -
` P(x) = (3 -x)/10 " for " x = - 1, 0, 1, 2`
= 0 otherwise
Then E(X) is ………… .

A

1

B

2

C

0

D

`-1`

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • The p.d.f. of a continuous random variable X is f(x) = K/(sqrt(x)), 0 lt x lt 4 = 0 , otherwise Then P(X ge1) is equal to

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