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bahrom7893

  • 4 years ago

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.

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  1. anonymous
    • 4 years ago
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    well they are adding this time because it is "or"

  2. bahrom7893
    • 4 years ago
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    I thought it was 6C2*7C2*4C2 but it's 6C2+7C2+4C2

  3. bahrom7893
    • 4 years ago
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    OHHHHHHHHHHHHH

  4. anonymous
    • 4 years ago
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    rigth one or the other , not both together

  5. bahrom7893
    • 4 years ago
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    I feel dumb...

  6. bahrom7893
    • 4 years ago
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    okay so if all, then *, if or then +

  7. anonymous
    • 4 years ago
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    lol it is the translation that is always the hard part. computing is the easy part

  8. anonymous
    • 4 years ago
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    it's addition, since it's optional. . (or)

  9. anonymous
    • 4 years ago
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    if it was two math books AND two science book AND two whatever, then you would multiply

  10. bahrom7893
    • 4 years ago
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    ok thanks guys.

  11. anonymous
    • 4 years ago
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    yw

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