There are 50 reports to be read. Ten are to be chosen for today's work.

(a) How many different possibilities are there for choosing the reports?

(b) If 5 of the 50 reports are important, what is the probability that at least 1 important report is read?

(c) What is the probability of no more than 1 important report to be read?

(d) Using the previous two results, what is the probability of exactly 1 important report being read?

explain functions used on calculator for part c and d