Mone2622 Mone2622
  • 06-02-2024
  • Mathematics
contestada

Let S = {1, 2, 3, 4, 5, 6, 7}. P is a subset of S. After replacing back in S the elements of P, again subset Q is selected. The number of ways such that n(PnQ) = 2, n(PuQ) = 4 is:
a) 0
b) 35
c) 21
d) 70

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