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The question is the following: YOur school has contracted with a professional magician to perform at the school. The school has guaranteed an attendance of at least 1000 and total ticket receipts of at least $4800. The tickets are $4 for students and $6 for non students, of which the magician receives $2.50 and $4.50 respectively. What is the minimum amount of money the magician could receive?

I am unsure how to set this up. So far I have 1000 is greater than or equal to 4s+6n (S=student n=nonstudent).

  • Algebra -

    I think i would look at this from another direction. the first part of the question says there is a guaranteed attendance and a guaranteed total ticket receipt. i would take this to mean that the magician is guaranteed a minimum of either 1000 attendees or $4800 which ever is greatest.

    so... if 1000 students showed up, that would only be $4000 (the minimum for 1000 attendees), which would mean we should work with the greater which would be minimum receipts of $4800.

    then... i know that of every $4 taken in, the magician gets $2.50, or 62.5%

    thus... 0.625*4800=$3000

    but, you have to check the assumptions we made in the beginning.

  • Algebra -

    This is a "linear programming" question

    first condition:
    S + n > 1000

    second condition:
    4S + 6n > 4800 or
    2S + 3n > 2400

    now graph these in the first quadrant on a S n grid, use the intercepts and it will be easy
    it is easy to solve S+n=1000 with 2S+3n=2400 to get
    S=600 and n=400

    The profit equation for the magician would be
    Prof = 2.5S + 4.5n

    if S=600, n=400
    Prof = 600(2.5) + 400(4.5) = 3300

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