Question

Assume that 9 people, including the husband and wife pair, apply for 4 sales positions. People are hired at random. (1) What is the probability that both the husband and wife are hired?

Answer 1

there are a couple of ways to do this
perhaps the easiest is to compute the denominator first , which is the number of ways to choose 4 out of 9, namely "9 choose 4" or
\[\binom{9}{4}\]do you know how to compute that number

Answer 2

yes then what