In a class of 30 students, the average weight of boys is 20 kg and the average weight            of the girls is 25 kg. The fraction of boys out of the total students of the class isOptions :4/55/63/4Data insufficient

The ratio of the number of boys and girls in a class is 5 : 3. If the average weight of all the boys is 63 kg, whereas that of the girls is 47 kg, find the average weight (in kg) of all the students in the class.

The average weight of 30 students is 45 kg. 15 students whose average weight is 48 kg left the class and 10 students whose average weight is 50 kg joined the class, and then find the new average weight of the students in the class.a45.2b45.4c45.6d45.8

There are 40 students in a class whose average weight is 56. 25kg.Among these 40 students 25 are boys and 15 are girls. The average weight of 25 boys is 6.8 kg more than the average weight of 15 girls. What is the average weight of 15 girls?

There are 100 students in a class.Number of boys is 10 more than the number of girls.The avergae weight of boys is 50kg and the avergae weight of the whole class is 45.5kg.the avergae weight of girls is?30 kg40 kg50 kg60 kg

in a class of 6 students average weight of the 5 lightest students is 30 kgs . average weight of 5 heaviest students is 35 kgs. what is the differnce between the maximim and minimum possible average weight overall.