Ratios, Rates, Proportional Relationships, and Units

SAT Math· difficulty 2/5

The ratio of cats to dogs at a shelter is 3:53:5. If there are 2424 cats, how many dogs are there?

  • A

    45

  • B

    36

  • C

    40

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  • D

    30

Explanation

frac35=frac24d\\frac{3}{5} = \\frac{24}{d}, so 3d=1203d = 120 and d=40d = 40.

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