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29 October, 12:23

In a survey, 480 people, or 75%, said they attended a movie at least once a month. How many people were surveyed?

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  1. 29 October, 12:33
    0
    This is a great problem to set up a proportion. We know that 480 people is 75% of some population, let's call it P. So we know that 480/P = 75/100 (because 75/100 is 75%). Therefore, we would solve 480/P=75/100, which would yield, 480*100=75P (cross multiplication). Then P = (480*100) / 75. P=640.
  2. 29 October, 12:37
    0
    480/3 = 160

    160 = 25%

    160*4 = 640

    640 people were surveyed.
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