A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

a cooler contains 7 cans of soda 3 colas, 3 oranges, and 1 cherry. Two cans are selected at random without replacement. Find the prob that at least one can is cola

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

    3/7*3/7=9/49

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

    scratch that

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

    then what

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

    Wow i feel stupid 3/7*7/7 i think so 21/49 seems more reasonable.

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

    does that seem right?

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

    It makes sense the first time I did I was intending both cans to be cola.

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

    It seems more reasonable, but is still wrong.

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

    so how do u do it?

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

    Draw a probability tree!

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

    Well than Sir Newton provide your expertise.

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

    Well, your method give the answer 3/7, which is clearly wrong; that's as if only one was picked, and completely ignores what happens if you pick another one first THEN cola; try again, or draw a tree!

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

    3/7*4/7=12/49?

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

    The probability of picking one in two attempts isn't less than picking one in one attempt. Try again.

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

    I dont get it order doesnt matter

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

    You either pick one first (3/7) or you pick one of the others first (4/7). If you pick it first (3/7) you can ignore that because whatever you pick next will make it true. For the others (4/7), you now have a 3/6 chance of picking cola. It's (3/7) * 1 + (4/7) * (3/6)

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

    but how can u times those fractions?

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

    is it the 3/6?

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

    can u please help me

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

    (a/b)*(c/d) = (ac)/(bd)

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

    15/21

  21. 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.