Question

43. Find the mean of the following distribution X 10 15 20 25 30 35 40 Total f 4 6 8 18 6 5 3 50 (A) 20.3 (B) 23.4 (D) 22.4 (C) 24.3
​

Answer 1

Answer:

Calculation of arithmetic mean

x

i

f

i

f

i

x

i

4 5 20

6 10 60

9 10 90

10 7 70

15 8 120

Total ∑f

i

=40 ∑f

i

x

i

=360

∴ Mean (

x

ˉ

)=

∑f

i

∑f

i

x

i

=

40

360

=9 check the answer once.

Answer 2

Step-by-step explanation:

20.3 is the answer to your question