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

Q26. **How many four digit numbers can be formed using the digits {1, 3, 4, 5, 7, 9}, given that repetition of digits is not allowed?**

  1.  360
  2.  60
  3.  300
  4.  180

Solution : 360
Q27. **How many four digit even numbers can be formed using the digits {2, 3, 5, 1, 7, 9}**

  1.  256
  2.  360
  3.  125
  4.  250
  5.  216

Solution : 216

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Q28. **In how many ways can six members be selected from a group of ten members?**

  1.  ⁶C₄
  2.  ¹⁰C₄
  3.  ¹⁰C₅
  4.  ¹⁰P₄
  5.  ¹⁰P₅

Solution : ¹⁰C₄
Q29. **A bag contains nine yellow balls, three white balls and four red balls. In how many ways can two balls be drawn from the bag?**

  1.  ⁹C₂
  2.  ³C₂
  3.  ¹⁶C₂
  4.  ¹²C₂
  5.  ¹⁴C₂

Solution : ¹⁶C₂

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Q30. **In how many ways can three consonants and two vowels be selected from the letters of the word "TRIANGLE"?**

  1.  25
  2.  13
  3.  40
  4.  20
  5.  30

Solution : 30
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Solution :

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