Question
Average of 4 positive integers is calculated as 45. It
was later found that while calculating the average, someone mistakenly entered 28 instead of 36. Find the correct average.Solution
Incorrect sum of four numbers = 45 × 4 = 180 Correct sum = 180 − 28 + 36 = 188 So, correct average = 188 ÷ 4 = 47
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