Civil Services UPSC EPFO (APFC) Mock Test 2023 Quantitative Aptitude Elementary Statistics

The mean of 20 observations is 15, On checking it was found that two observations were wrongly copied as 3 and 6. If wrong observations are replaced by correct values 8 and 4, then the correct mean is?

1
15
2
15.15
3
15.35
4
16
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