3.103: Selections including Abby and Ben

0606/22/O/N/24 — Question 7 · 6 marks

(a)
A class of 10 students includes Abby and Ben. A group of 5 is selected. Find the number of groups containing both Abby and Ben (and the other printed conditions).
[3]
(b)
Find the number of groups for the remaining condition(s) in the question.
[3]