Question

Four students get 90s on a test, three get 70s, 2 get 60s and one gets an 80. what is the mean test score in this group?

Answer 1

The mean score will be given by:
mean=
mean=[90*4+70*3+2*60+80]/10
=[360+210+120+80]/10
=770/10
=77
the mean score is 77