In a school average weight of girls and boys are 30 kg and 36 kg. If number of girls is twice of the number of boys, then what will be the average weight of all the students in school?
Answer & explanation
Correct answer: option 3
Lets assume number of boys be x
number of girls are 2x
Sum of weights of girls = 30 x 2x = 60x
Sum of weights of boys = 36 × x = 36x
Average weight of all students = \(\frac{60x + 36x}{3x}\) = 32