Question
The average score of Neha in 5 subjects was recorded as 62.
However, her marks in Science and History were mistakenly entered as 49 and 60 instead of 59 and 72. What is her correct average score?Solution
ATQ,
Sum of marks according to wrong data = 62 × 5 = 310
Correct total marks = 310 - (49 + 60) + (59 + 72) = 332
Actual average marks = 332 ÷ 5 = 66.4
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