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Math Help - Students At the Party

  1. #1
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    Students At the Party

    At a school costume party, seven girls wore masks and nine boys did not. If there were 15 boys at the party and 20 students did not wear masks, what was the total number of students at the party?
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  2. #2
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    Quote Originally Posted by symmetry View Post
    At a school costume party, seven girls wore masks and nine boys did not. If there were 15 boys at the party and 20 students did not wear masks, what was the total number of students at the party?
    Create a table, like follows:

    Code:
            MASKS|~MASKS|TOTAL
    BOYS     6        9      15
    GIRLS    7       11      18
    TOTAL    13       20     33
    I hope the above comes out correctly.

    ~MASKS = did not wear a mask.

    Now can you answer the question?
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  3. #3
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    ok

    33 students at the party.
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