Question
The average weight of 14 students in a class is 30 kg.
Two more students weighing 20 kg and 24 kg join the class. What is the average weight of the class now?ÂSolution
Given: Average weight of 14 students = 30 kg So, total weight of 14 students = 14 × 30 = 420 kg Two more students join with weights: Student 1 = 20 kg & Student 2 = 24 kg Their total = 20 + 24 = 44 kg New total weight = 420 + 44 = 464 kg New number of students = 14 + 2 = 16 students New average weight = Total weight ÷ Total students = 464 ÷ 16 = 29 kg
Complete the series by replacing ‘?’
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