A) In a ten day period, the probability of a certain number of outbreaks of a contagious viral infection is represented in the table below.

What is the random variable x?

x P(x)

0 0.30

1 0.40

2 0.27

3 0.02

4 0.01

B) If the probability of having type AB Blood is 0.543, what is the probability that in a group of four people, all four have type AB Blood?

C) What are the four criteria for abinomial distribution.