The mean weight of 15 students is 110 kg. The mean weight of 5 of them is100 kg. and that of another five students is 125 kg., then the mean weight ofthe remaining students is:(a) 120(b) 105(c) 115(d) None of thes

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

Select the correct answerThere 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?Options7952465558

Select the correct answerThe average weight of a certain number of students in a group is 72 kg. If 10 students having an average weight of 78 kg leave and 4 students having an average weight of 80 kg join the group, the average weight of the students in the decreases by 0.7 kg. The number of students initially in the group is?Options46445456

The weight of 12 students(in kg) are:40, 61, 54, 50, 59, 37, 51, 41, 48, 62, 46 and 34.(i) Calculate the mean weight and the median weight.(ii) After 6 months the weight of each student increases by 4 kg, find thenew mean weight.(iii) If the weight of one students was misread as 34 instead of 28, findthe correct median weight.

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.