3.1 A box contains 3 red pencils, 2 blue pencils and 4 green pencils. Raj chooses 2 pencils at random, without replacement. Calculate the probability that a__a green pencil.. b they are both red, c they are both the same colour, d exactly one of the two pencils is green. b Another bag contains 7 green balls and 3 yellow balls. Sani takes three balls out of the bag, without replacement. Find the probability that all three balls he chooses are yellow.
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