THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING

Multiple Choice

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING:
Suppose you know that the number of complaints coming into a phone center averages 4.2 every ten minutes.Assume that the number of calls follows the Poisson distribution.
-What is the probability that there are exactly four calls during the next ten minutes?

A) 0.194
B) 0.172
C) 0.156
D) 0.134