Question

Which of the following are not the probability distribution of a random variable ?

A.X	0	1	2
P(X)	0.4	0.4	0.2
B.X	0	1	2
---	---	---	---
P(X)	0.4	0.4	0.2
C.Y	-1	0	1
---	---	---	---
P(Y)	0.6	0.1	0.2
D.Z	3	2	1
---	---	---	---
P(Z)	0.3	0.2	0.4
E.X	0	1	2
---	---	---	---
P(X)	$\frac{25}{36}$	$\frac{10}{36}$	$\frac{1}{36}$
Choose the correct answer from the options given below :

• A. A and E only
• B. B, C and D only
• C. A, D and E only
• D. C, A and D only

Answer 1

Answer: (B)

B, C and D only

Answer 2

The correct option is (B) :B, C and D only.