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Question : The average of 20 numbers is calculated as 35. It is discovered later on that while calculating the average, one number, 85, was misread as 45. The correct average is:

Option 1: 36

Option 2: 36.5

Option 3: 37

Option 4: 37.5


Team Careers360 4th Jan, 2024
Answer (1)
Team Careers360 14th Jan, 2024

Correct Answer: 37


Solution : The average of 20 numbers = 35
The sum of 20 numbers = 20 × 35 = 700
Now add 85 and subtract 45,
Correct sum = 700 – 45 + 85 = 740
$\therefore$ Correct average = $\frac{740}{20}$ = 37
Hence, the correct answer is 37.

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