Question
The average of 9 scores is 45. If two new scores are added
and their average is 'x', the overall average becomes 20% more than the previous average. Find the value of 'x'.Solution
ATQ,
Sum of 9 scores = 9 × 45 = 405
New average of all the numbers = 45 × 1.2 = 54
So, sum of 11 numbers = 54 × 11 = 594
So, average of two new scores = (594 - 405) ÷ 2 = 94.5
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