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Average marks of total 8 subjects were calculated to be 74. Later it was discovered that marks of 1 subject was misread as 98 instead of 89. What is the correct average?

A68.75

B70.25

C72.875

D82.5

Answer:

C. 72.875

Read Explanation:

Total marks in 8 subjects = 74 × 8= 592 ⇒ Corrected marks = 592 - 98 + 89 = 583 Correct average = 583/8 = 72.875


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