Basic Maths Mcqs


Q.  The arithmetic mean of the scores of a group of students in a test was 52. The brightest 20% of them secured a mean score of 80 and the dullest 25% a mean score of 31. The mean score of remaining 55% is___________?

a. 45
b. 50
c. 51.4 approx.
d. 54.6 approx.



 
 

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