The marks of 5 students in a unit test are given below:-

$x – 1, 2x +1, 2x – 2, x – 1, 2x + 3$ where $x = 5$.

On the basis of above information answer the questions.

The mean of the data in numerals is

8

$x – 1, 2x +1, 2x – 2, x – 1, 2x + 3$

Marks of 5 students is, where $x = 5$:

⇒ (5 - 1), (10 + 1), (10 - 2), (5 - 1), (10 + 3)

⇒ 4, 11, 8, 4, 13

Now,

Mean = \(\frac{Sum\;of\;terms}{number\;of\;terms}\) = \(\frac{4\;+\;11\;+\;8\;+\;4\;+\;13}{5}\) = \(\frac{40}{5}\) = 8