7 The numbers of men and women who visit a clinic each hour are independent Poisson variables with means 2.4 and 2.8 respectively.
- Find the probability that, in a half-hour period,
(a) 2 or more men and 1 or more women will visit the clinic,
(b) a total of 3 or more people will visit the clinic. - Find the probability that, in a 10 -hour period, a total of more than 60 people will visit the clinic.