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Permutations and Combinations · Discussion forum

Medium Level Question 35 – answer, explanation & discussion

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Question 35 Back to Exercise

How many 4-letter arrangements of the letters of PROBLEM contain the letter M?

  • A 840
  • B 360
  • C 480 Correct
  • D 120
Correct Answer: Option C

All: 7P4 = 840

Without M: 6P4 = 360

With M = 480

Answer: 480

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