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An opening for a movie, every 12th person gets a free ticket, every 15th person gets free popcorn. How many people get both prizes?(please show work)

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    How many people attend the movie?

  • math -

    The persons getting a free ticket would be numbers 12,24,36,48,60,72,...
    the persons getting free popcorn would be
    numbers 15,30,45,60,75,...

    isn't 60 the LCM of 12 and 15?

    so the people getting both would be number
    60,120,...

    So, Ms. Sue pointed out, we would have to know how many people attended to answer the question.
    I am sure you can take it from here.

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