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% of a mean score of 31. The mean score of remaining 55% is
1.40.8 approx
2.45.3 approx
3.51.4 approx
4.53.8 approx
Posted Date:-2022-02-22 12:21:52