Question

The marks (out of 100) obtained by a group of students in a science test are 85, 76,90, 85, 39, 48, 56, 95, 81 and 75. Find the:(i) Highest and the lowest marks obtained by the students.(ii) Range of the marks obtained.(iii) Mean marks obtained by the group.

Answer 1

First, we have to arrange the number of marks in ascending order.
Ascending order is,
`39,48,56,75,76,81,85,85,90,95`
(i) Highest marks are `95` and lowest marks are `39`.
(ii) Range = `95-39 = 56`
(iii) Mean` = (39+48+56+75+76+81+85+85+90+95)/10 = 730/10 = 73`