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There are 42 people in pilates class. Today, 36 of them brought yoga mats, 26 of them brought eco-friendly water bottles, and 20 of them remembered to bring both yoga mats and water bottles. How many people had to suffer through class having neither a yoga mat nor a water bottle?

 
SmartMathMan  Jan 9, 2018
edited by SmartMathMan  Jan 9, 2018
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The number that brought only yoga mats = 36 - 20  =  16

The number that brought only water bottles = 26 - 20  = 6

 

So......let the number that had neither  =  N

 

And we have that

 

42  = 16 + 20 + 6  + N  simplify

 

42  =  42  + N

 

So.....N  =  0.......[ nobody forgot both items ]

 

 

cool cool cool

 
CPhill  Jan 10, 2018

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