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Combinatorics quiz
Five questions on Combinatorics. Answer all 5 to see your score. Questions are drawn from a bank of 15, so every attempt is different.
Question 1 of 5
How many 3-letter codes can be made from 26 letters if letters may repeat?
Question 2 of 5
How many ways can 5 runners finish 1st, 2nd, 3rd?
Question 3 of 5
C(10, 3) equals:
Question 4 of 5
C(20, 18) equals:
Question 5 of 5
How many distinct arrangements of the letters in BOOK?