The mean marks of 20 students is 15. On checking it was found that two – McqOptions

MCQOPTIONS

1.	The mean marks of 20 students is 15. On checking it was found that two marks were wrongly copied as 3 and 6. If wrong marks obtained are replaced by correct values 8 and 4, then the correct mean is
A.	15
B.	15.15
C.	15.35
D.	16
Answer» C. 15.35

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