a bag contains 7 blue counter, 5 green counters, 2 black counter and 1 white...
a bag contains 7 blue counter, 5 green counters, 2 black counter and 1 white...
a bag contains 7 blue counter, 5 green counters, 2 black counter and 1 white counter ,3 counter are taken at random from the bag ,without replacement. what is the probability that they are all the same colour?
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