Question

The marks in a subject for 12 students are as follows :

31, 37, 35, 38, 42, 23, 17, 18, 35, 25, 35, 29

Find the mean of this data.​

Answer 1

Answer:

30.4166667

Step-by-step explanation:

Mean =

$\frac{sum \: of \: the \: observations}{no \: of \: observations}$

$\frac{31, 37, 35, 38, 42, 23, 17, 18, 35, 25, 35, 29}{12}$

= 30.4166667

Thus the mean of this data is 30.4166667.

Hope it helps!!

Answer 2

Answer:

• Mean of the given data is 30.4

Step-by-step explanation:

Given:

• Data of Marks in a subject for 12 students.

To Find:

• Mean of the given data.

Solution:

First let's note down the sum of observations.

⇒Sum of observations = 31+37+35+38+42+23+17+18+35+25+35+29

⇒Sum of observations = 365

We already know that the number of observations is 12.

Hence, to find the mean, we use the following formula:

⇒ Mean = Sum of observations/Number of observations

Let's apply the formula:

⇒ Mean = 365/12

⇒ Mean = 30.4

Final Answer:

→ Mean of the given data is 30.4