bahrom7893
  • bahrom7893
satellite73 A student has to sell 2 books from a collection of 6 math, 7 science, & 4 economics books. How many choices are possible if both books are on the same subject.
Mathematics
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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.
schrodinger
  • schrodinger
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anonymous
  • anonymous
well they are adding this time because it is "or"
bahrom7893
  • bahrom7893
I thought it was 6C2*7C2*4C2 but it's 6C2+7C2+4C2
bahrom7893
  • bahrom7893
OHHHHHHHHHHHHH

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anonymous
  • anonymous
rigth one or the other , not both together
bahrom7893
  • bahrom7893
I feel dumb...
bahrom7893
  • bahrom7893
okay so if all, then *, if or then +
anonymous
  • anonymous
lol it is the translation that is always the hard part. computing is the easy part
anonymous
  • anonymous
it's addition, since it's optional. . (or)
anonymous
  • anonymous
if it was two math books AND two science book AND two whatever, then you would multiply
bahrom7893
  • bahrom7893
ok thanks guys.
anonymous
  • anonymous
yw

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