Quantcast

A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

sritama

  • 2 years ago

A fair die is rolled (2n+1) times.The probability that the faces with even number show odd number of times is- a) (3n+1)/(4n+2) b) 3/4 c)2/3 d)1/2

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

    The whole roll 2n+1 times, get k even numbered die is a binomial distribution but I wonder

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

    if the symmetry of the probability can't make this a bit easier.

  3. wio
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    We can definitely use the fact that it is multiple choice though...

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

    If \(n=0\) then clearly getting an even face means you win, so the probability is \(1/2\).

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

    Which knocks out b and c

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

    i am getting d as the answer , but the book is saying a.

  7. wio
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    When \(n=1\). what is the probability?

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

    You have three rolls, if you roll 1 or 3 evens, you win

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

    hm,yes

  10. wio
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    oops, that doesn't actually matter, when \(n=1\) then a) is still 1/2

  11. wio
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    They need to be different.

  12. wio
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    n=2 gives 7/10 for a, but d is still 1/2 so.... 5 rolls, what is the probability of odd even rolls

  13. wio
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Weird... There is no explanation for a)?

  14. timo86m
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    D i think

  15. 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.