A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 4 years ago

A fair coin is flipped four times. What is the probability of getting heads at least once?

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

    didn't we just do this?

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

    no

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

    oh you are right, 4 times. sorry

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

    we can list them or we can use a formula. your choice

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

    a formula

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

    at least once means 1 or 2 or 3 or 4, so not 0 the probability you get zero heads is \[(\frac{1}{2})^4\]so the probability you get at least one head is \[1-(\frac{1}{2})^4\]

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

    The sample space of the experiment is hhhh hhht hhtt httt hhth hthh htth htht thhh tthh ttth thth thht tttt thtt ttth so the number of times of getting heads at least once is 15 out of 16. But there is a better way. If you know that the probability of getting a heads at least once is mutually exclusive of getting all tails then P[heads at least once] = 1 - P[all tails] = 1 - 1/16 = 15/16

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

    of course zero heads mean all tails, i.e. you got t t t t

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

    satellite u r brainy

  10. 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.