From the set of 6 letter of A, B, C, D, E, F,
there are 20 different 3-letter subsets that could be selected.
Quantity A: The number of 3-letter subsets that include the letter F
Quantity B: 10
1) A > B
2) A < B
3) A = B
4) The relationship cannot be determined from the information given
答案是3
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