1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
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: Probability of deck of cards question

  1. Mar 10, 2010 #1
    1. The problem statement, all variables and given/known data

    Use probability trees to determine the probability of obtaining,in a deck of cards:

    two red cards (A-10 hearts or diamonds) and two picture cards (any suit) in any order?
    2. Relevant equations

    3. The attempt at a solution
    P(1st red card)= 20/52 P (2nd red card)=19/51
    P(1st picture card) = 12/52 P(2nd picture card)=11/51
    How would you combine these together to get the solution? Do you use joint probability?
  2. jcsd
  3. Mar 10, 2010 #2
    I don't know joint probability. But you can get the answer by multiplying the numbers together.
  4. Mar 11, 2010 #3
    I don't know much about cards (can you tell me how many picture cards and how many color cards are there in a deck)
  5. Mar 11, 2010 #4
    Do you replace the first card once picked out of the deck?
  6. Mar 11, 2010 #5
    Are you serious you don't know? There are Jacks, Queens and Kings (picture), Ace's, 2-10's. Four of each.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook