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25 February, 11:54

A bag contains hair ribbons for a spirit rally. The bag contains 9 black ribbons and 6 green ribbons. Lila selects a ribbon at random, then Jessica selects a ribbon at random from the remaining ribbons. What is the probability that Lila selects a black ribbon and Jessica selects a green ribbon? Express your answer as a fraction in simplest form.

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  1. 25 February, 11:56
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    Since these are done in order, and without replacement:

    Lila selecting black = 7/12 (7 black ribbons out of 12 ribbons total)

    Jessica * then * selecting a green ribbon = 5/11 (5 green ribbons left out of 11 ribbons left)

    Chance of this specific event = (7/12) * (5/11) = 35/132 Mike · 6 years ago
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