anonymous
  • anonymous
There are 30 students enrolled in a math class and each of them attended at least one of the first two lessons. The first lesson was attended by 27 students and the second lesson was attended by 20. How many students attended both of the first two lessons?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
I'm pretty sure the answer is 13, however, I need to show it using discrete math.
inkyvoyd
  • inkyvoyd
set theory ayay
anonymous
  • anonymous
yeah, but I'm not sure how to go about it.

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inkyvoyd
  • inkyvoyd
@phi u knows math rite
phi
  • phi
I think you should draw a Venn diagram one circle is class 1 and the other is class 2
phi
  • phi
|dw:1378164962638:dw|
anonymous
  • anonymous
Wow, makes sense now, thank you! :)

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