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In the game of roulette a ball rolls into one of 37 slots. All the slots are evenly likely. Eighteen of the slots are red, eighteen are white and 1 is green. the ball is rolled 10 times. Calculate the probability of exactly 6 reds? the answer is 0.l94

  • math -

    prob(red) = 18/37
    prob(not red) = 19/37

    prob 6 reds out of 10
    = C(10,6) (18/37)^6 (19/37)^4
    = using calculator
    = 210(.00092179)
    = appr .194

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