Question
Ten values are listed such that the average of the first
three numbers is 10, and the last five numbers have an average of 28. If the fourth and fifth values average to 20, find the overall average of all ten numbers.Solution
ATQ,
Average of all the 10 numbers = {(3 × 10) + (5 × 28) + (2 × 20)/10}
= {(30 + 140 + 40)/10} = 210/10 = 21
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