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Let U={1,2,3,…..,20}. Let A, B, C be the...

Let U={1,2,3,…..,20}. Let A, B, C be the subsets of U. Let A be the set of all numbers, which are perfect squares, B be the set of all numbers which are multiples of 5 and C be the set of all numbers, which are divisible by 2 and 3. Consider the following statements :
I. A, B, C are mutually exclusive.
II. A, B, C are mutually exhaustive.
III. The number of elements in the complement set of `AuuB` is 12.
Which of the statements given above are the corret?

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