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If U = {x : x is a 1 to 19 natural number less than 20}, its subsets are A = {y : y is a prime number} and B = { z: zis a factors of 18}.
(a) What are the cardinal numbers of sets A and B?
(b)Show the above information in a Venn diagram.. B
(c) AUB = A Show that: AUB = An B. ww [3]
(d)
What type of sets are AUB and AUB? [1]

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