Snapdeal Interview Question | White Marble
Question
There are 6 marbles in a bag, 1 is white. You reach in the bag 100 times. After drawing a marble, it is placed back in the bag. What is the probability of drawing the white marble at least once?
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Answers ( 3 )
Probability of White Atleast once = 1 – Probability of not white
= 1 -(5/6)^100
There are 6 balls and out of those 6 balls, one ball is white. So the probability of getting a white ball when we draw once is 1/6.
Hence the probability of doing the same thing 100 times is = (1/6)^100.
Probability of drawing the white marble at least once = 1- probability of getting black marble all the time
=1-(5/6)^100