Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

kcla1996 Group Title

You have checked out b books from the library, where b is a number greater than 5. You plan to read three of the books and return them at the end of this week. In how many ways can you pick the books you will read first, second, and third?

  • one year ago
  • one year ago

  • This Question is Closed
  1. jim_thompson5910 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Hint: you have 'b' choices for the first book, b-1 choices for the second book and b-2 choices for the third book

    • one year ago
  2. kcla1996 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    i don't get it

    • one year ago
  3. jim_thompson5910 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Look up the counting principle and that may help you out

    • one year ago
  4. jim_thompson5910 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    It's not counting as in (1, 2, 3, 4...), it's counting as counting a very large number of items http://www.regentsprep.org/Regents/math/ALGEBRA/APR1/Lcount.htm

    • one year ago
  5. kcla1996 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    b1*b2?

    • one year ago
  6. jim_thompson5910 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    close, but not quite

    • one year ago
  7. jim_thompson5910 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Say you pick out 10 books, you would have 10 books for the first choice, 9 for the second, and 8 for third So you would have 10*9*8 = 720 choices possible

    • one year ago
  8. kcla1996 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    b^3 ?

    • one year ago
  9. jim_thompson5910 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    no

    • one year ago
  10. jim_thompson5910 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    multiply out b, b-1 and b-2

    • one year ago
  11. kcla1996 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    (5b-3)?

    • one year ago
  12. jim_thompson5910 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    no

    • one year ago
  13. jim_thompson5910 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    b(b-1)(b-2) = ???

    • one year ago
  14. kcla1996 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    b^3-3b^2+2b

    • one year ago
  15. jim_thompson5910 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    you got it

    • one year ago
  16. kcla1996 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    thank you!

    • one year ago
  17. jim_thompson5910 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    yw

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.