Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Combanatorics Problem (Probability Application)

  1. Mar 17, 2010 #1
    1. The problem statement, all variables and given/known data From a load of 50 Panasonic tape recorders 35 are destined for L.A. and 15 are destined fro Miami. If two are shipped to Trenton by mistake and the "selection" is made at random, determine the probabilities that:

    a) both should have gone to L.A.

    b) one should have gone to L.A. and the other to Miami



    2. Relevant equations



    3. The attempt at a solution Alright, I think I'm starting to get the hang of these. But I want to bounce this one off of somebody to get a second set of eyes on it.

    For P(both to L.A.) I am getting (35 choose 2)/(50 choose 2) = 0.4857

    For P(one to each city) I am getting [(35 choose 1)(15 choose 1)]/(50 choose 2) = 0.4286
     
  2. jcsd
  3. Mar 17, 2010 #2

    jav

    User Avatar

    Looks good to me
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook