Find the arithmetic mean of the following data.

X	5	10	15	20	25	30
F	3	5	6	2	1	3

Correct option is A

Given:

Data for calculating arithmetic mean

Formula Used:

Mean =$$\frac{\sum x_i f_i }{\sum f_I}$$​​

Solution:

​$$\sum x_i f_i$$  = 15 + 50 + 90 + 40 + 25 + 90 = 310

​$$\sum f_i$$= 3 + 5 + 6 + 2 + 1 + 3 = 20

Mean $$= \frac{310}{20}$$​ = 15.5