The mean marks obtained by a class of 40 students is 65; The mean marks of half of the students is found to be 45. The mean marks of the remaining students is
A. 85
B. 60
C. 70
D. 65
Answer:A
The mean marks obtained by a class of 40 students is 65; The mean marks of half of the students is found to be 45. The mean marks of the remaining students is
A. 85 B. 60 C. 70 D. 65