Average Formula with Questions – Easy Explanation for Students

Meta Description: Learn average formula easily with solved examples, shortcuts, questions, and answers. Best beginner maths guide for students.

Introduction

Average is one of the most useful maths topics in school and daily life. We use averages in marks, salaries, temperatures, cricket scores, and statistics.

In this lesson, you will learn the average formula in a simple and easy way with examples.

What is Average?

Average means a single value that represents a group of numbers.

It is found by adding all values and dividing by the number of values.

$\text{Average}=\frac{\text{Sum of all values}}{\text{Number of values}}$

Example 1: Find Average of 4 Numbers

Find average of 10, 20, 30, 40

$\frac{10+20+30+40}{4}=\frac{100}{4}=25$

Average = 25

Example 2: Student Marks Average

Marks scored: 75, 80, 85, 90, 70

$\frac{75+80+85+90+70}{5}=\frac{400}{5}=80$

Average marks = 80

Example 3: Cricket Runs Average

Runs scored in 3 matches: 45, 60, 75

$\frac{45+60+75}{3}=\frac{180}{3}=60$

Average runs = 60

Shortcut Trick

If numbers are equally spaced:

10, 20, 30, 40, 50

Middle number is average.

$\text{Average}=30$

Real Life Uses of Average

• Student marks
• Family monthly expenses
• Sports performance
• Temperature reports
• Business sales

Practice Questions

1. Find average of 5, 10, 15
2. Find average of 12, 18, 24, 30
3. Marks are 60, 70, 80, 90. Find average.
4. Find average of 100, 200, 300, 400, 500

Answers

1. $\frac{5+10+15}{3}=10$
2. $\frac{12+18+24+30}{4}=21$
3. $\frac{60+70+80+90}{4}=75$
4. $\frac{100+200+300+400+500}{5}=300$

Common Mistakes to Avoid

• Forgetting to divide by total number of values
• Wrong addition of numbers
• Dividing by wrong count

Conclusion

Average is easy when you remember: add all values, then divide by total numbers. Practice regularly because averages are useful in exams and real life.

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