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SAT Prep

Category - Math

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Olivia bought 4 kg of apples for $5.20. What is the cost of 3 kg of apples?

$3.80
$3.90
$4.00
$4.10
$4.20

Explanation

Answer: B - The cost of 3 kg of apples is $3.90. Money and apples vary directly.
x:5.20 = 3:4
4x = 3 × 5.20
x = (3 × 5.20)/4 = 3 × 1.30 = 3.90

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