Question

The arithmetic mean of the scores of a group of students in a test of
mathematics was 48. The brightest 20% of them secured a mean score of
75 and dullest 25% a mean score of 30. The mean score of the remaining
55% is: *
o 560/11
O 56
O 510/11
O 670/11​

Answer 1

#this is the answer#

#I hope this helps you#