Use the letters a, b, c, d, e, and f. write all possible selections of three letters that can be formed from the letters. (the order of the three letters is not important. enter your answer as a comma-separated list of three-letter combinations. the order of these sets of letters is not important.)

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13 June, 10:29

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Lucia Chambers · Answer 1

There are 6C3 = 20 such combinations.

abc, abd, abe, abf

acd, ace, acf, ade

adf, aef, bcd, bce

bcf, bde, bdf, bef

cde, cdf, cef, def