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26-05-2017
Mathematics

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A jar contains five blue marbles and three red marbles. Suppose you choose a marble at random, and do not replace it. Then you choose a second marble. Find the probability of the following event. Both of the selected marbles are red.

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26-05-2017

For the first event
P=3/(5+3)=3/8=0.375

Total became 2 red and 5 blue .... 7 total

For the second event
P=2/(5+2)=2/7= 0.2857

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