Question

Urgent please!!! I really don’t understand it, tysm to anyone who can answer thissss :))))

Answer 1

Given:

The frequency distribution table.

To find:

The mean average score on a test.

Solution:

The frequency distribution table is

`Marks (x_i)`
`Frequency(f_i)`
`f_ix_i`

x a xa

y b yb

z c zc

Sum a+b+c xa+yb+zc

Now, the mean average score on the test is

`Mean=(\sum f_ix_i)/(\sum f_i)`

`Mean=(xa+yb+zc)/(a+b+c)`

Therefore, the mean average score on the test is
`(xa+yb+zc)/(a+b+c)`.