Amir, Bonnie and Chris are enjoying a coffee and a catch up in the sunshine.
Amir is 32.
Bonnie is 48.
The mean age of Amir, Bonnie and Chris is 50.
Work out the age of Chris.
Answer:
Since the mean = sum of the ages / number of ages
The mean = 32 + 48 + Chris’ age / 3
Therefore since the mean is equal to 50 we can form an equation with c as Chris’ age
50 = 32+48+c / 3
Multiply both sides by three
150 = 32+48+c
Then subtract Amir and Bonnie’s ages to find c
c = 70
Chris is 70 years old.