Question

Find the arethmetic mean of 10.15.25 20 30?

Answer 1

Explanation:

Given quantities are,

10,15,20,25,30

Avrerage= sum of all quantities/no.of quantities

= 10+15+20+25+30/5=100/5=20

hope it's helpful

Answer 2

Answer:

x f fx

5 4 20

10 5 50

15 7 105

20 4 80

25 3 75

30 2 60

Total N=25 ∑fx=390

Arithmetic Mean,

x

ˉ

=

N

∑fx

=

25

390

=15.6