Question
The average weight of 48 students in a school is 32 kg.
If two new students with weights of 'x' kg and '(x + 6)' kg join the group, the average weight of the class increases to 32.4 kg. Determine the average weight of the two new students.Solution
Total weight of 48 students = 48×32 = 1536 kg When two students join the class then new total weight = 50×32.4 = 1620 kg Increase in weight = 1620-1536 = 86 kg Average of 2 new students = 84/2 = 43 kg
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