Question

24. The average weight of 60 students is 40 kg. There are
60% boys among them. If the average weight of the
boys is 48 kg, find the average weight of the girls.
a) 24 kg 6) 36 kg x 28 kg
d) 44 kg e) 34 kg
​

Answer 1

Answer:

(C) 28

Step-by-step explanation:

x/60 = 40 x = 60×40 = 2400

Boys = 60×60/100 = 36 , Girls = 60 - 36 = 24

Average (Boys) = b/36 = 48 , b = 36×48 = 1728

b + g = x g = x - b

g = 2400 - 1728 = 672

Average (Girls) = 672/24 = 28