Numeracy Foundation November 2019 Unit 2 Q7

7. Five pupils attended a dance class every Thursday.

For these five pupils:

• the median of their ages is 17 years,
• the mode is 18 years,
• the range of their ages is 8 years,
• one pupil is 2 years older than the youngest pupil.

Coleen now joins this class.
She is two years younger than the mean age of the other 5 pupils.

How old is Coleen?
You must show all your working. [4]