Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Anita505

  • one year ago

One ordinary quarter and a fake quarter with two heads are placed in a hat. one quarter is selected at random and tossed twice . If the outcome is "HH" what is the probability that an ordinary quarter was selected?

  • This Question is Closed
  1. Anita505
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Help me pleaseee

  2. sirm3d
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    P(HH) = P(HH | T) + P(HH | F) P(HH | T) = (1/4) (1/2) = 1/8 P(HH | F) = (1) (1/2) = 1/2 P(HH) = (1/2) + (1/8) = 5/8 P(T | HH) = P( HH & T) / P( HH) = (1/8) / (5/8) = 1/5

  3. Anita505
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    okay thank you so the answer is 1/5 i have another question to ask you.

  4. sirm3d
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    in terms of HH outcomes, 2 heads = {HH, HT, TH, TT; HH}, where the first 4 outcomes are from an ordinary quarter, the last outcome is from the fake quarter HH outcome from the true coin = 1, number of outcomes in the experiment = 5 P = 1/5

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

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

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.