A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

40 students live in a dormitory. 5 have swine flu. If 4 students are selected at random, what is the probability that 1 or 2 of the 4 have swine flu?

  • This Question is Closed
  1. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    (5/40)(4/39)((3/37)= 1.03950104*10^-3

  2. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    This is not the correct answer

  3. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    can u tell me what it is please, i suck at probablity, my weakest subject

  4. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Google'd and discovered this.... http://www.jiskha.com/display.cgi?id=1298256153

  5. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no problem. so I found (40 nCr 4)= 91390 then \[(35 nCr 3)(5 nCr 1)+(35 nCr 2)(5 nCr 2)=38675\] then \[38675\div91390=0.423\]

  6. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I actually posted that crsf29 and they didnt have the right answer either

  7. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Did it work out for you? I could dig out my ProbStat book and help you, but it would take me about 20 minutes and I'd wake my roomies...Sorry.

  8. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    you dont have to do that I figured it out

  9. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

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.