A bag contains 9 discs of which 4 are red, 3 are blue and 2 are yellow. The discs are similar in shape and size. A disc is drawn at random from the bag. Find the probability that it is either red or blue.
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A bag contains 9 discs of which 4 are red, 3 are blue and 2 are yellow. The discs are similar in
shape and size. A disc is drawn at random from the bag. Find the probability that it is either red
or blue.
