Question

if the mean of the following data is 26.7 then find the value of f​

Answer 1

where is the data ??????????????

Answer 2

Complete Question:

If the mean of the following data is 26.7, then find the value of f.

$x_i$   15   20   25    30    35    40

$f_i$    4     8     18      f       7     3

Given:

• Mean = 26.7

To find:

• Value of f

Answer:

•    Mean = (∑xf)/∑f

       ⇒ $26.7 = \frac{15 * 4 + 20 * 8 + 25 * 18 + 30* f+ 35* 7 + 40 * 3}{4 +8+18+f+7 +3}$

       ⇒ 1068 + 26.7 f = 1035 + 30f

       ⇒ f = 10

• Value of f = 10.