Question
The average marks of Karan in 5 different papers was
calculated as 73. But it was later found that his marks in two subjects were wrongly entered as 80 and 68 instead of 85 and 79. What is his accurate average?Solution
ATQ,
Wrong total = 73 × 5 = 365
Correct total = 365 - (80 + 68) + (85 + 79) = 381
Correct average = 381 ÷ 5 = 76.2
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