Discrete Random Variable Expectation (Jee Mains) | ExamDuo
Ask Doubts
Log in
Random Variables and Distributions
Medium
Discrete Random Variable Expectation
If the p.m.f. of a d.r. v. X is :
P (x) = (C /x³) ; for x = 1 , 2 , 3
= 0 ; otherwise ,
E (X) equals :
SELECT ONE OPTION
A
297
251
B
294
251
C
343
297
D
297
343
Check
Ask about this question