"how many students surveyed didnt follow any one of the three sports?"?

Pickles

New member
"40 enjoyed baseball. 40 enjoyed basketball. 40 enjoyed football. 20 enjoyed basketball and football. 22 enjoyed baseball and basketball. 27 enjoyed football and baseball. 12 enjoyed all three sports."

i have been working this problem for hours and i still dont get it. could u help me solve it? or help me how to solve it?
 
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