Question

Average weight of total boys and girls is 42.7 kg average weight of boys is 44 kg and and that of girls is 40 kg if there are 27 boys how many girls are there

Answer 1

Let girls = x

Wight of boys = 44*27 = 1188

weight of girls = 40*x = 40x

Total wright of students = 42.7 (27+x) = 1152.9 + 42.7x

1188 + 40x = 1152.9 + 42.7x

42.7x - 40x = 1188 - 1152.9

2.7x = 35.1

x = 351/27

x = 13

girls were 13

Answer 2

the correct answer is 13girls