There are 3 boys and 2 girls in a choir. One boy and one girl will be selected to sing a duet. (a) Work out the number of ways of choosing a boy. (b) Hence work out the total number of ways of choosing a boy and a girl.
181 exam-style questions on OCR GCSE Maths The Product Rule for Counting. Each one has a worked solution and a mark scheme showing where the marks go.