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16 December, 16:24

Seventy concert tickets were sold for $550. Each adult ticket cost $9 and each children's ticket cost $5. Find the number of adult tickets and the number of children's tickets sold.

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  1. 16 December, 16:40
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    Total tickets = 70

    Total cost = $550

    Adult's ticket = $9

    Child's ticket = $5

    Difference = 9 - 5 = $4

    Assume all 70 are child's tickets

    5 x 70 = 350

    But the total cost was 550

    550 - 350 = $200

    The $200 must have come from Adult's tickets, which has a difference of $4.

    200 : 4 = 50

    So there are 50 adult's tickets.

    70 - 50 = 20

    And there are 20 child's tickets.
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