Consider a set of elements X₁, (a) How many 8-element subsets contain x3? X12. (b) How many 8-element subsets do not contain x9? (c) How many 8-element subsets contain x3 and x6 but do not contain x9?

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Consider a set of elements X₁,
(a) How many 8-element subsets contain x3?
X12.
(b) How many 8-element subsets do not contain x9?
(c) How many 8-element subsets contain x3 and x6 but do not contain x9?
Transcribed Image Text:Consider a set of elements X₁, (a) How many 8-element subsets contain x3? X12. (b) How many 8-element subsets do not contain x9? (c) How many 8-element subsets contain x3 and x6 but do not contain x9?
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