Question 713230
Suppose P and Q are equivalent sets and n(P)=17. 
What is the minimum number of elements in P u Q?
Ans: 17 if each element of P is also an element of Q
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What is the maximum?
Ans 34 if each element of P is different from those in Q
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What is the minimum number of elements in P n Q?
Ans: 0 if each element of P is different from those in Q
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What is the maximum?
Ans: 17 if each element of P is also in Q
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Cheers,
Stan H.