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Mathematics
Noormuskan:

A bucket contains 5 blue, 4 green and 5 red balls. Sudheer is asked to pick 2 balls randomly from the bucket without replacement and then one more ball is to be picked. What is the probability he picked 2 green balls and 1 blue ball?

Vocaloid:

The first pick: the probability of getting green is (# of green balls)/(total # of balls) The second pick: the first pick is done without replacement, so the # of green balls and total # of balls each decrease by 1. Calculate the # of green balls and total balls left over at this point, then calculate the probability of getting green again. Third pick: # of blue balls / total # of balls Remember that the total # of balls has decreased by 1 again after the second pick

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