The arithmetic mean of the scores of a group of students in a test was 52. The brightest of them secured a mean score of 80 and the dullest a mean score of 31. The mean score of remaining is:
A. 45
B. 50
C. approx.
D. approx.
Answer:C
The arithmetic mean of the scores of a group of students in a test was 52. The brightest of them secured a mean score of 80 and the dullest a mean score of 31. The mean score of remaining is:
A. 45 B. 50 C. approx. D. approx.