Question

Determine whether each of the following is a probability distribution. Give reasons for your answer.

x	0	1	2
P(x)	0.4	0.4	0.2

Answer 1

Here, P(x) > 0 for all values of x

Now, consider,

`sumP(x)` = 0.4 + 0.4 + 0.2 = 1

∴ Given distribution is a probability distribution.