The mean of 25 observations was found to be 78.4. But later on it was found that 96 were misread as 69. The correct means is-

A. 76.54

B. 78.4

C. 79.48

D. 81.32

Answer: Option C

Solution(By Examveda Team)

Correct sum = (78.4 × 25 + 96 - 69) = 1987
∴ Correct mean
= $$\frac{1987}{25}$$
= 79.48