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) The highest and the lowest marks obtained by the students. (ii) Range of the marks obtained. (iii) Mean marks obtained by the group.

(i) Highest marks obtained by the student = 95
Lowest marks obtained by the student = 39

(ii) Range of marks = Highest marks – Lowest marks = 95 – 39 = 56

(iii) Mean of obtained marks = Sum of marks/Total number of marks
= 85+76+90+85+39+48+56+95+81+75/10
= 730/10 =73
Thus, the mean marks obtained by the group of students is 73.

Class 7 Maths Chapter 3 Exercise 3.1

for more answers vist to:
https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-3/