1. The two-way table shows the age and sex of a sample of 50 pupils in a school. 11 years old
12 years old
3
13 years old
6
16 years old
4
Boys
4
14 years old
2
6
8
15 years old
5
4
9
Total
24
26
50
Girls
3
6
2
6
5
8
Total
9
10
a) How many pupils are aged 13 years or less? 22
b) What percentage of the pupils in the table are 16?
c) A pupil from the table is selected at random. What is the probability that the pupil will be 14 years
of age? Give your answer as a fraction in its lowest form.