(a(i))[2]
Mrs Singh’s class contains 20 girls. The ratio of girls : boys is $5 : 3$. Show that Mrs Singh has 32 students in her class.
(a(ii))[4]
Mr Patel’s class has 40 students. The ratio of girls : boys is $3 : 2$. For the 72 students in the two classes, determine the ratio of the total number of girls : the total number of boys. Give your answer in its simplest form.
(b)[3]
Calculate the total cost of the tickets.
(c)[2]
Find the time when the play finishes.
(d)[3]
Calculate the percentage increase in the price of a programme.
(e(i))[1]
Write down the probability that a student does not lose their ticket.
(e(ii))[1]
Work out how many of the 72 students you would expect to lose their ticket.