A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 4 years ago

HELP PLEASE! PRETTY PLEASE! Can you tell me if my answer is correct? I am being asked to flip a coin 4 times and determine what the probability of each of my coin flips turning up tails or heads is. This is my answer. The probability of each of my coin flips turning up “male” or “female” is C (4, 2) = 4! / (4 - 2)! (2!) = 4*3*2*1 / (2*1) (2*1) = 24 / 2*2 = 24/4 = 6 Total number of possibilities = 2^n where n = number of events (flips) So, total = 2^4 = 16 So probability = (number of times two tails appear) / (total number of events) = 6/16 = 3/8 I just want to know if I correctly solved

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

    If you are flipping "a coin 4 times and determining what the probability of each of my coin flips turning up tails or heads is," then why did you only compute the probability of getting 2 tails? Would you consider stating the problem exactly as it appears in your book or problem source? Thanks.

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

    Thank You so much for coming in to help me! The question is: Flip a coin 4 times and determine what the probability of each of your coins turning up heads or tails.

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

    Take a look at this video after you get this problem solved. Good reinforcement. http://www.youtube.com/watch?v=xNLQuuvE9ug Here is work based on my understanding of the problem: We can get 0T, 1T, 2T, 3T, or 4T. P(0T) = C(4,0) (1/2)^0 ((1/2)^4 = 1 x 1 x (1/16) = 1/16 wher C(4,0) means a set of 4 taken 0 at the time or four choose zero. P(1T) = C(4,1) (1/2)^1 (1/2)^3 = 4 x 1/2 x 1/8 = 4/16 P(2T) = C(4,2) (1/2)^2(1/2)^2 = 6 x1/4 x 1/4 = 6/16 P(3T) = C(4,3) (1/2)^3 (1/2)^1 = 4 x 1/8 x 1/2 = 4/16 P(4T) = C4,4) (1/2)^4 (1/2)^0 = 1 x 1/16 x 1 = 1/16 Note that you are most likely to get two tails but that is not certain.

  4. 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.