permutations-and-combination

Permutations and Combination

Permutation and Combination: Difference between Permutation and Combination, Permutation Meaning, Permutation and Combination Formula, Questions, Problems

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Online Aptitude Questions with Answers on Permutations and Combination

Q16. **How many three letter words are formed using the letters of the word TIME?**

  1.  12
  2.  20
  3.  16
  4.  24
  5.  30

Solution : 24
Q17. **Using all the letters of the word "THURSDAY", how many different words can be formed?**

  1.  8
  2.  8!
  3.  7!
  4.  7
  5.  6!

Solution : 8!

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Q18. **Using all the letters of the word "NOKIA", how many words can be formed, which begin with N and end with A?**

  1.  3
  2.  6
  3.  24
  4.  120
  5.  12

Solution : 6
Q19. **The number of arrangements that can be made with the letters of the word MEADOWS so that the vowels occupy the even places?**

  1.  720
  2.  144
  3.  120
  4.  36
  5.  204

Solution : 144

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Q20. **The number of permutations of the letters of the word 'MESMERISE' is_.**

  1.  9!/(2! 2! 3!)
  2.  9!/(2! 2! 2! 3!)
  3.  9!/(2! 2! 3! 3!)
  4.  5!/[(2!)^2 3!]
  5.  8!/[(2!)^2 (3!)^2]

Solution : 9!/(2! 2! 3!)
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Solution :

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