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      Question

      How many four-letter words without repetition having

      exactly two vowels can be formed by using the letters of the word "MONARCH"?
      A 216 Correct Answer Incorrect Answer
      B 228 Correct Answer Incorrect Answer
      C 240 Correct Answer Incorrect Answer
      D 252 Correct Answer Incorrect Answer
      E 264 Correct Answer Incorrect Answer

      Solution

      "MONARCH" has 5 consonants and 2 vowels.
      Number of ways to select the letters = 2C2 × 5C2 = 1 × 10 = 10
      Arrangements of 4 letters = 4! = 24
      Total number of words formed = 10 × 24 = 240

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