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21-07-2018
Mathematics

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A bag contains 4 red marbles and 5 blue marbles. If two marbles are chosen at random, one at a time and without replacement, what is the probability of getting two red marbles?

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konrad509 konrad509

21-07-2018

[tex] |\Omega|=9\cdot8=72\\
|A|=4\cdot3=12\\\\
P(A)=\dfrac{12}{72}=\dfrac{1}{6}\approx17\% [/tex]

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