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Mathematics for IGCSE & O level - Ratio And Proportion (Section 1 - No. 12)

If the ratio of apples to oranges is 5:3 and there are 15 apples, find the number of oranges.
9
10
21
25

解释

Apples:Oranges = 5:3, if 15 apples, then 5*3. 3*3 = 9.

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