Ill give hella points which of the following is a valid probability distribution?

answer:

probability distribution a is valid probability distribution.

step-by-step explanation:

the conditions   for any probability distribution to be valid is:

(1) the probability should not be negative

2)the probability of individual should be less than 1

(3)the sum of all the probabilities must be 1.

so, first two conditions in all the three cases is true.

now, we will check for (3) condition:

the sum of   all the probabilities in a is:   .42+.38+.13+.07=1

therefore, a is valid probability distribution.

the answer is 1/4

step-by-step explanation:

14

step-by-step explanation:

14