Question:
The average marks in English subject of a class of 24 students is 56. If the marks of three students were misread as 44, 45 and 61 of the actual marks 48, 59 and 67 respectively, then what would be the correct average?
A56
B59
C57.5
DNone of these
Answer:
D. None of these
Explanation:
Total marks of 24 students = 24x56 = 1344 New total marks of 24 students = 1344-44-45-61+48+59+67 = 1368 Hence required average = 1368/24 = 57