CAIE S1 2019 November — Question 2

Exam BoardCAIE
ModuleS1 (Statistics 1)
Year2019
SessionNovember
TopicPermutations & Arrangements
TypeArrangements with positional constraints
2
  1. How many different arrangements are there of the 9 letters in the word CORRIDORS?
  2. How many different arrangements are there of the 9 letters in the word CORRIDORS in which the first letter is D and the last letter is R or O ?
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