Question

*If there are 30, 22, 25, 28, 31, 20 and 26 children in the first to seventh class of the school respectively, what is the average number of children in the class?*

1️⃣ 28
2️⃣ 23
3️⃣ 29
4️⃣ 26

Answer :- 4️⃣
26
​

Answer 1

Answer:

First, add all the numbers.

30 + 22 + 25 + 28 + 31 + 20 + 26 = 182

Total terms = 7

Formula for average = sum of all terms ÷ total no. of terms.

= 182 ÷ 7 = 26

Answer 2

Given:

If there are 30, 22, 25, 28, 31, 20, and 26 children in the first to seventh class of the school respectively

To find:

what is the average number of children in the class?

solution:

30, 22, 25, 28, 31, 20 and 26

Sum :

30, 22, 25, 28, 31, 20 and 26

=> 30 + 22 + 25 + 28 + 31 + 20 + 26

=> 182

Total observations:

30, 22, 25, 28, 31, 20 and 26

There are total 7 observations.

Average :

Average = Sum of observations/Total observations

=> Average = 182/7

=> Average = 26

Hence, the required answer is Option 4️⃣=> 26