A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

A hockey player scores by probability of 18%. How many shots does he expect to take before he can score a goal.

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

    @kropot72

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

    @UsukiDoll

  3. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    if the player makes 50% of the shots, how many would you expect him to need to shoot before he makes one?

  4. mathmate
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Geometric distribution: The probability distribution of the number X of Bernoulli trials needed to get one success, supported on the set { 1, 2, 3, ...} The expected value of N for the first success is 1/p where p=0.18 for this problem. See: https://en.wikipedia.org/wiki/Geometric_distribution

  5. mathmate
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    The means that if we repeat the same experiment many times, there will be an equal number of outcomes above and below N=1/p. If p=0.4, then N=1/0.4=2.5. If the same experiment is repeated say 1000 times, then \(approximately\) 500 need 3 or more tries, and 500 will need 2 or less tries.

  6. 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.