T2.5 The weekly number X of visits of the emergency department in a small town has a Poisson distribution with mean mu = 10 visits per week. Use Table A.2 to find the probability that a) the number of...

T2.5

The weekly number X of visits of the emergency department in a small town has a Poisson distribution with mean mu = 10 visits per week. Use Table A.2 to find the probability that

a) the number of visits during a particular week exceeds 7.

b) the number of visits during a
two-week
period is between 15 and 20, inclusive.