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17 June, 06:51

The ratio of blue marbles to white marbles in a bag is 4 to 5. at this rate, how many blue marbles are there if there are 15 white marbles

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Answers (2)
  1. 17 June, 07:02
    0
    4/5 = B/W = B/15

    B = 4*15/5 = 12
  2. 17 June, 07:06
    0
    4:5 = x : 15

    let x be blue marbles

    4 (15) = 5x

    x = 12

    therefore 12 blue marbles
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