Question
Mathematics Question on Mean Deviation
The mean marks of 120 students is 20. It was later discovered that two marks were wrongly taken as 50 and 80 instead of 15 and 18. The correct mean of marks is
A
19.19
B
19.17
C
19.21
D
19.14.
Answer
19.19
Explanation
Solution
Answer (a) 19.19