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 1

To Find Average of :- 30 , 22 , 25 , 28 , 31 , 20 and 26.

Used Concept :- To Find Average the formulae is :-

$\frac{sum \: of \: all \: observations \: }{total \: number \: of \: observations \: }$

Now , Average = 30+22+25+28+31+20+26/ 7

$\frac{182}{7}$

$\frac{7 \times 26}{7}$

$26$

Therefore , Correct Answer is4️⃣ 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, what is the average number of children in the class?*

1) 28

2) 23

3) 29

4) 26

Answer :-

we know that,

• Average = sum of observations. / Total number of observations.

→ Sum of all children from 1st to 7th class = 30 + 22 + 25 + 28 + 31 + 20 = 182 .

and,

→ Total class from 1 to 7 = 7 .

then,

→ Average = Sum of all children from 1st to 7th class / Total class from 1 to 7 = 182/7 = 26 (4) (Ans.)

Learn more :-

*If 24.8 mm of rain fall was recorded in July, what was the average daily rainfall?*

1️⃣ 1.2 mm

2️⃣ 0.8 mm

3️⃣ 0.02 mm

...

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