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21 March, 16:57

A cup contains green and red marbles. If there are 18 marbles in the cup, which of the following could NOT be the ratio of green to red marbles? 2:3 1:2 1:1 1:5 1:8

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  1. 21 March, 17:33
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    Marbles can not be in the ratio of 2:3.

    Step-by-step explanation:

    In this question total number of marbles are = 18

    Ratio of green: Red marbles are 2:3 1:2 1:1 1:5 1:8

    1). First we take the ratio of 2:3

    Then number of green marbles = 18 * (2/5) = 36/5

    and number of red marbles = 18 * (3/5) = 54/5

    Which is not possible because number of marbles can not be in fraction.

    2). In ratio of 1:2

    Number of green marbles = 18 * (1/3) = 6

    Number of red marbles = 18 * (2/3) = 12

    3). In the ratio of 1:1

    Red and green are equal = 9 marbles each

    4). In the ration of 1:5

    Green marbles = 18 * (1/6) = 3

    Red Marbles = 18 * (5/6) = 15

    5). In the ration of 1:8

    Green marbles = 18 * (1/9) = 2

    Red marbles = 18 * (8/9) = 16
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