There are a total of 45 boys and girls in the school swimming club.
18 of the team are boys and 27 are girls.
The mean age of the 18 boys is 16.2 years.
The mean age of the 27 girls is 16.7 years.
Can you calculate the mean age of all 45 boys and girls?
Answer:
Total age of 18 boys = 16.2 x 18 = 291.60 years
Total age of 27 girls = 16.7 x 27 = 450.90 years
So:
Average (mean) age of 45 children = (291.60 + 450.90)/ 45 = 16.5 years