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Mathematics for IGCSE & O level - Ratio And Proportion (Section 6 - No. 36)

If 3 apples cost $1.50. What is the cost of a dozen apples?
$3.00
$4.50
$6.00
$7.50

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1. 50/3 = $0.50 per apple. 12 apples * $0.50= $6.00

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