The average of 100 observations in a study was calculated as 49.7 . Later it was revealed that one of the observations was misread as 64 instead of 94. What will be the correct average ?

A 52.5
B 49.8
C 55
D 50

Correct Answer: 50

The erroneous total of the obsevations = 49.7 x 100 = 4970 The correct total of the observations = 4970 - 64 + 94 = 5000 So, the correct average = 5000/100 = 50.
Bissoy MCQ
#গণিত #গড় (Average) #Dutch-Bangla Bank Ltd #Dutch-Bangla Bank Ltd - Management Trainee Officer - 09.10.2009

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