Let's solve each of the word problems step by step and show all the working.
---
Problem 1:
The prices of 5 books are $7, $15, $13, $9 and $11. What is the average price of the books?
#### Step 1: Add all the prices together.
$$
7 + 15 + 13 + 9 + 11 = 55
$$
#### Step 2: Divide the total by the number of books (5).
$$
\text{Average} = \frac{55}{5} = 11
$$
✔ Answer: The average price of the books is
$11.
---
Problem 2:
3 men in a group weigh 50 kg, 64 kg and 57 kg. What is the average weight of each man in the group?
#### Step 1: Add the weights.
$$
50 + 64 + 57 = 171
$$
#### Step 2: Divide by the number of men (3).
$$
\text{Average} = \frac{171}{3} = 57
$$
✔ Answer: The average weight is
57 kg.
---
Problem 3:
Mr. Ali earns $124 every month. Mr. Jamshed earns $200 and Mr. Ahmad earns $150. What is the average earning of each of them?
#### Step 1: Add their earnings.
$$
124 + 200 + 150 = 474
$$
#### Step 2: Divide by the number of people (3).
$$
\text{Average} = \frac{474}{3} = 158
$$
✔ Answer: The average earning is
$158 per person.
---
Problem 4:
Seema got 76 marks in Maths exam, 88 marks in English exam, 95 marks in Science exam and 77 marks in Geography exam. On average how much did Seema score in each exam?
#### Step 1: Add all the marks.
$$
76 + 88 + 95 + 77 = 436
$$
#### Step 2: Divide by the number of exams (4).
$$
\text{Average} = \frac{436}{4} = 109
$$
Wait! That can't be right — maximum marks per exam is usually 100, so an average of 109 is impossible.
But let's check the addition:
- 76 + 88 = 164
- 164 + 95 = 259
- 259 + 77 =
336
Ah! I made a mistake in addition.
Correct total:
$$
76 + 88 = 164 \\
164 + 95 = 259 \\
259 + 77 = 336
$$
Now divide:
$$
\frac{336}{4} = 84
$$
✔ Answer: Seema’s average score is
84 marks per exam.
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✔ Final Answers:
1. Average price of books:
$11
2. Average weight:
57 kg
3. Average earning:
$158
4. Average marks:
84
All steps shown with correct calculations!
Parent Tip: Review the logic above to help your child master the concept of age word problems worksheet.