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Mathematics for IGCSE & O level - Ratio And Proportion (Section 5 - No. 25)
If 8 identical items cost $24, what is the cost of 5 of these items?
$12
$15
$18
$20
Forklaring
Cost per item = 24/8 = 3. Therefore cost of 5 items = 3*5 = 15
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