In a choir there are 27 men and 60 women.
4
The probability that a man chosen at random wears glasses is
9
7
The probability that a woman chosen at random wears glasses is
12
a) Work out the number of people in the choir who wear glasses.
Your final line should say, Total = ...
b) A person is chosen at random from the choir.
Work out the probability that the person does not wear glasses.