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Mathematics 19 Online
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.

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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