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Ratios, Rates, Proportional Relationships, and Units

SAT Math· difficulty 3/5

A jar has red and blue marbles in ratio 2:32:3. If 44 blue marbles are removed, the ratio becomes 1:11:1. How many red marbles?

  • A

    6

  • B

    12

  • C

    10

  • D

    8

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Explanation

Let red =2k= 2k, blue =3k= 3k. 2k=3k−42k = 3k - 4, so k=4k = 4. Red =8= 8.

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