Hi, if in an urn there are 3 red balls and 2 white balls and we draw 2 balls from the urn without replacement.(adsbygoogle = window.adsbygoogle || []).push({});

If we assume that at each ball in the urn is equally likely to be chosen, what is the probability that both balls are red?

I know the solution is [tex] \frac{\binom{3}{2}}{\binom{5}{2}}[/tex], but i want to show the elements of the sample space, for example are they the elements: [tex]r_1, r_2, r_3, w_1, w_2[/tex]?

If i split the events in two disjoint events as R_1={the first ball is red} and R_{the second ball is red} what are the elements of these sets?

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Probability, balls in an urn

Loading...

Similar Threads - Probability balls | Date |
---|---|

Advanced (Or simple?) balls in a jar probability | Jun 7, 2015 |

Probability to extract balls problem | Mar 22, 2015 |

Probability question involving picking balls from a bag | Nov 30, 2014 |

Probability of throwing balls into bins | Apr 23, 2011 |

Probability of 3 successive ball picks? | Jun 30, 2010 |

**Physics Forums - The Fusion of Science and Community**