(a(i))[1]
Find the value of $n(A\cap B)$.
(a(ii))[1]
Find the set $A'\cup B$.
(a(iii))[1]
A number $r$ is chosen at random from $\mathcal{E}$. Find the probability that $r\in A\cup B$.
(b(i))[2]
Use a Venn diagram, or another method, to find the number of people who had read both a book and a newspaper.
(b(ii))[2]
Two of the 10 people who had read a book are selected at random. Work out the probability that they had both read a book and a newspaper.