Հարց 113

Which purchase has the lowest price per kilogram?

4.80 dollars for 1.2 kilogramsՃիշտ պատասխան
6.25 dollars for 1.25 kilograms
3.60 dollars for 0.8 kilogram
7.50 dollars for 1.5 kilograms

Բացատրություն

The unit prices are 4.80 ÷ 1.2 = 4, 6.25 ÷ 1.25 = 5, 3.60 ÷ 0.8 = 4.5, and 7.50 ÷ 1.5 = 5 dollars per kilogram. Comparing total prices alone would wrongly favour 3.60 dollars even though its quantity is also smaller.

Բացատրություն

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