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Sagot :
alright well if you pulled out a blue marble on the second go then you can make the connection that you had originally pulled out a black marble on the first go.
so the probability of pulling out a blue marble on the second go is 13/52
"13" is the original number of blue marbles added after selecting the black marble
"52" is me simply add up all the marble in the bag..the 14 red marbles, 26 black marbles minus the 1 pulled out and not replaced so now its 25 and the 13 blue marbles added last.
so the probability of pulling out a blue marble on the second go is 13/52
"13" is the original number of blue marbles added after selecting the black marble
"52" is me simply add up all the marble in the bag..the 14 red marbles, 26 black marbles minus the 1 pulled out and not replaced so now its 25 and the 13 blue marbles added last.
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