In a class of 60 students, 20 are girls. The average weight of the boys in the class is 40 kg, while that of all the girls is 35 kg. What is the average weight (in kg) of the entire class (correct to two decimal places)?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 38.33.
Number of Boys and Girls = 40 : 20 = 2 : 1
Boys : Girls
2 : 1
40 : 35
So, Average = = 115/3 = 38.33