Unit 4 · Statistics and Probability
How Many Pets in Total?
Lesson 3 of 8
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About this lesson
A frequency table shows how many people own 0, 1, 2, 3 or 4 pets. To find total pets, multiply each pet count by how many people own that many — then add those products. Don’t just add the two columns separately.
Chapters
0:00Introduction
0:22The Question
1:00Decoding the frequency relationship
1:28Calculating subtotals row-by-row
2:01Accumulating the grand total
2:28Exam strategy — bypassing the total people trap
3:06Confirming the final option
Question
Shireen asks some people how many pets they own.
The table shows her results.
| Number of pets | Number of people |
|---|---|
| 0 | 7 |
| 1 | 12 |
| 2 | 6 |
| 3 | 9 |
| 4 | 5 |
What is the total number of pets owned by all these people?
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