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OpenStudy (anonymous):
A beg contains 5 white, 7 red and 4 black balls. On drawing three balls at random find the probability of being all white.
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OpenStudy (perl):
you can do it in steps what is the probability of drawing the first white ball
OpenStudy (anonymous):
5/16
OpenStudy (perl):
right, now you removed a white ball, how many do you have left
OpenStudy (anonymous):
5/16 since there is 5 white balls out of 16 balls in the bag
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