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60 students take an exam with two questions a andbb. If 35 students solve question a, 28 solve question b, and 5 students solve neither of the two questions, how many students solved only question a?

 Jul 6, 2020
 #1
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Here is a Venn Diagram of this situation;

 

 Jul 6, 2020
 #2
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how did we know the "8" between a & b?

Guest Jul 6, 2020
 #3
avatar+28021 
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5 students solved neither question  leaving 55

 

 

35 + 28 = 63      which is 8 more than 55   ....so there must be an '8' overlap .....

ElectricPavlov  Jul 6, 2020
 #4
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Thanks!! 

Guest Jul 7, 2020

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