Question
Average of 5 figures is 70. When two more figures are added
with an average of 'x', the new average increases by 10%. Find the value of 'x'.Solution
ATQ,
Sum of 5 figures = 5 × 70 = 350
New average of all the numbers = 70 × 1.1 = 77
So, sum of 7 numbers = 77 × 7 = 539
So, average of two new figures = (539 - 350) ÷ 2 = 94.5
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