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104. The average of three numbers x, y a...

104. The average of three numbers x, y and 2 is 45. Among them, x number is 9 more than the average of y and 2. And the average of y and z is 2 more than y. Accordingly, what is the difference between x and 2? (a) 3 (b) 5 (c) 7 (d) 11

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