There are 5 yellow, 4 violet, 2 purple, 4 navy, and 4 orange marbles in a hat. You pick 2 marbles from the hat. Marbles are not returned after they have been drawn. Find the probability. Assume that the spinner is separated into equal sections.
P(the first marble is purple and the second marble is not yellow)
2 answers
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19 marbles
p(first is purple) = 2/19
now 18 marbles,
what is p(yellow) first
p(yellow) = 5/18
so
p(NOT yellow) = 13/18
p purple then not yellow) = 2/19 * 13/18
p(first is purple) = 2/19
now 18 marbles,
what is p(yellow) first
p(yellow) = 5/18
so
p(NOT yellow) = 13/18
p purple then not yellow) = 2/19 * 13/18
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