Average weight is the total weight divided by the number of people.
To find the average weight of boys, we first look for the total weight of all (boys + girls), and the total weight of the girls.
Weight of all (boys + girls):
44 * 50 = 2200 kg
Weight of girls:
40 * (50 - 40)
40 * 10 = 400 kg
The total number of girls is 50-40 because it's stated that there are 50 students in a class of which 40 are boys and the rest are girls.
To get the total weight of boys, we subtract the weight of all by the weight of girls:
2200 - 400 = 1800 kg
Since there are 40 boys, the average weight of boys is:
1800 / 40 = 45 kg
hope this helps~ `u`
There are 50 students in a class of which 40 are boys and the rest are girls
the average weight of the class is 44kg and the averageweight of the girls us 40kg.
find the average wieght of the boys
4 answers
yes
Thanx
Thick hai
4 answers