Picking up balls at random
Probability
Level
pending
There are 8 red balls, 5 yellow balls and 2 green balls in a bag. A person picks up some balls at random. Find the probability that he picks 5 red balls and 2 yellow balls (one ball at a time) if he had been picking the balls without replacement.
The answer is 0.024864024.
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1 solution
Here , the number of balls is 15. So, as he picks 5 balls, 5 balls are getting reduced. So, (5C2X (8x7X6X5X4X4X3)/(15X14X13X12X11X10X9) )