
12 candles are selected at random from a large collection of white, red, green and yellow candles. The number of candles
12 candles are selected at random from a large collection of white, red, green and yellow candles. The number of candles of each colour is unlimited. Find the probability that the selection contains at least one marble of each colour?
a. 34/91
b. 23/31
c. 36/91
d. 33/91
e. 1/4
need a good and easy approach
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