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Sam is playing songs on her mp3 player. She has 7 hip-hop songs, 9 rock songs, and 7 pop songs. If she has the mp3 player play the songs at random without repeating, what is the probability that the first song will be a rock song and the second song will be a hip-hop song?

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2 answers
  1. What is (9/23)(7/22) ?
    assuming that the player will not play the same song two times in a row.

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    Reiny
  2. If there are N songs in total, then
    P(rock,hip) = #rock/N * #hip/(N-1)

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    oobleck

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