Question

3. If the mean of the following frequency distribution is 7.2 find value of 'K': in table to end
in photo

2
4
6
8
10
12
4
10
7
16
K
f
3​

Answer 1

Explanation:

=∑F∑Fx=40+K260+10K=7.2

260+10K=288+7.2K

2.8K=28

K=10.