Answer
$\overline{x} = 4.714285714$
Work Step by Step
To solve for the mean of the given frequency distribution, perform the following steps:
(1) Multiply the score and the corresponding frequency.
(Refer to the $fx$ column in the attached image below.)
(2) Add the products in step (1) to obtain $132$.
(3) Add the frequencies to obtain $28$.
(4) Divide the result in step (2) by the result in step (3) to obtain:
$\overline{x} = \dfrac{132}{28}=4.714285714$