Question

6. The marks (out of 50) obtained by a group of
students in a mathematics test are :
45, 46, 40, 45, 49, 38, 46, 48, 30, 22
Find :
(i) Highest and lowest marks obtained by
the students.
(ii) Range of the marks obtained.
(iii) Mean marks obtained by the group.
(iv) How many students have marks less
than the mean marks ?​

Answer 1

Step-by-step explanation:

(1) Highest Marks- 49

Lowest Marks- 22

(2)Range=Highest Marks-Lowest Marks

=49-22

=27

(3)Sum of all observations/ No. of observations

=409/10

= 40.9

(4) 4 students, i.e. 40,38,30,22 marks