If X is a random variable with probability mass function - Mathematics and Statistics

Advertisements
Advertisements

If X is a random variable with probability mass function

P(x) = kx ,  x=1,2,3

      = 0 ,     otherwise

then , k=..............

(a) 1/5

(b) 1/4

(c) 1/6

(d) 2/3

 

Advertisements

Solution

(c)

x 1 2 3
P(x) k 2k 3k

Since, the function is a p.m.f.

∴ ∑P(xi) = 1
∴ k + 2k + 3k = 1
∴ k = 1/6

  Is there an error in this question or solution?
2013-2014 (October)

APPEARS IN

Video TutorialsVIEW ALL [1]

Share
Notifications



      Forgot password?
Use app×