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## Question

primary 6 | Maths
| Data Analysis

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The answer is 12

Book: 5 units

(which is why pen is 3/5 of book)

Total: 8 units

8 units = 32

1 unit = 4

5 units = 20

3 units = 12

so the book costs $20 (and the pen costs $12).

It does not make sense for the book to cost $12 in this case.

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