A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 4 years ago

2 Selected from the group at random but assume there are 5 males and 7 females. 1.) what is the probability that 2 females are selected?___________________ 2)What is the probability that 2 males are selected?_______________________

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

    1.\( \huge \frac{\binom{7}{2} }{\binom{12}{2}}\)

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

    2.\( \huge \frac{\binom{5}{2} }{\binom{12}{2}} \)

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

    do i multiply 7 by 2 and 12 by 2? for the 1st step

  4. Directrix
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Of the 7 females, we select 2 and of the 5 males we select 0. C(7,2) times C(5,0) =21. Of the 12 people, there are 66 possible random selections of 2. Probability is the number of desirable outcomes (2 females) divided by the number of possible outcomes (66 groups of 2). P(2 F) = 21/ 66 = 7/22 ==> ANS Check this, CW.

  5. Directrix
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    )What is the probability that 2 males are selected. Of the 7 females, we select 0. Of the 5 males, we select 2 for our two-person group. C(7,0) times C(5,2) = 10 groups of 2-males There are C(12,2) possible groups of 2 or 66 two person groups of any gender. P(2M) = 10/66 = 5/33 ==> ANS

  6. Directrix
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Check these, CW, and see if they are correct.

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

    it is good for the second not the first

  8. Directrix
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I was looking at the 3-dice problem. I'll look at this now.

  9. Directrix
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Do you have P(2 F) = 21/ 66 for part (a) about the two females?

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

    now i do:)

  11. 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.