"The mean of 25 observations was found to be 78.4. But later on it was found th
Channel: Doubtnut
Date: 2020-04-12

"The mean of
 25 observations was found to be 78.4. But later on it was found that 96 was
 misread as 69. The correct mean is
(a)
 76.54 (b) 78.4 (c) 79.48 (d) 81.32"