Question: Let S={A,B,C,D,E,F,G,H,I} (16) How many 4-element subsets does the set S have? (17) How many 4-element subsets does S have that contain A ? (18)
Let S={A,B,C,D,E,F,G,H,I} (16) How many 4-element subsets does the set S have? (17) How many 4-element subsets does S have that contain A ? (18) How many 4-element subsets does S have that contain A or B
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