Question 1.

The probability of a voter supporting party A is 0.6. Find the probability that in a random sample of 10 voter there are:

A). Exactly 3 supporters

B). Exactly 6 supporters

C). At least 2 supporters

D). Find the expected number of supporters

E). Find the standard Deviation

Question 2.

The number of calls an office receives follows a poisson distribution with mean equals 6 calls per minute.

Find the probability that the office receives:

A). Exactly 4 calls in the next minutes

B). Exactly 8 calls in the next minute

C). At most 2 calls in the next minute

D). Find the Standard Deviation