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There are twice as many students in the cooking club as in the drama club. Suppose there are  students in the drama club and  students who are members of both clubs. Find an expression for the total number of students who are in the cooking club or the drama club but not both. Give your answer in simplest form.

 
 Jan 8, 2021
 #1
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Using a Venn diagram, the answer is 4a - b.

 
 Jan 8, 2021
 #2
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it is wrong

 
 Jan 11, 2021

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