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16 March, 07:29

Rita uses 10 buttons on each rag doll she makes for her toy business. Two-fifths of the buttons she uses are blue and the rest are red. If Rita makes 115 rag dolls, how many red buttons does she use?

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  1. 16 March, 11:25
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    Number of rag dolls made by Rita = 115

    Number of buttons Rita uses on each rag doll = 10

    Then

    Total number of buttons required by Rita = 115 * 10

    = 1150

    Number of blue buttons used by Rita = (2/5) * 1150

    = 2 * 230

    = 460

    Then

    The total number of red buttons used by Rita = 1150 - 460

    = 690

    So Rita uses 690 red buttons for making 115 rag dolls. I hope the procedure is clear enough for you to understand.
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