Question

In a class, there are 50 students. The average
weight of all the girls is 30 kg. The average weight of
30 of the boys is 40 kg. Which of the following can
be a possible value of the average weight of the
entire class (in kg)?
(A) 31
(B) 33
(C) 35
(D) 37​

Answer 1

Answer: 40 kg

Step-by-step explanation:

Total avg of class = avg of boys,+ avg of girls

40*45 = 25*48 + 15*x

1800 - 1200 = 15*x

x= 40

Avg weight of girls was 40 kg