Exam Questions Papers - Engineering

Q1:

Px(X) = M exp(- 2 |x|) + N exp(- 3 |x|) is the probability density function for the real random variable X, over the entire x axis. M and N are both positive real numbers. The equation relating M and N is

A

B

C M + N = 1

D M + N = 3

ANS:A -

Using property of probability density of [M exp(- 2 |x|) + N exp(- 3|x|)]dx 1 ⇒ .