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In a class of 40 students, 17 have ridden an airplane; 28 have ridden a boat; 10 have ridden a train; 12 have ridden both an airplane and a boat; 3 have

ridden a train only; 4 have ridden airplane only. HOW did you get the actual answers? I already know the actual answers. But HOW to get those actual answers?

(Reposted again)


Since you have given the complete values in the Venn Diagram, I only assume the values originally missing.

Please click image below.  

0 0 0
The ones that i have pointed arrows on are the actual answers and the one that does not have arrows are the given ones
And my question is how. The solution on how to get the ones that i pointed arrows with
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