# 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

Q21. **A committee has 5 men and 6 women. What are the number of ways of selecting 2 men and 3 women from the given committee?**

1.  150
2.  200
3.  250
4.  300
5.  None of these

Solution : 200
Q22. **A committee has 5 men and 6 women. What are the number of ways of selecting a group of eight persons?**

1.  165
2.  185
3.  205
4.  225
5.  None of these

Solution : 165
Q23. **There are 18 stations between Hyderabad and Bangalore. How many second class tickets have to be printed, so that a passenger can travel from any station to any other station?**

1.  200
2.  190
3.  95
4.  100
5.  380

Solution : 380
Q24. **A letter lock consists of three rings each marked with six different letters. The number of distinct unsuccessful attempts to open the lock is at the most -.**

1.  216
2.  243
3.  215
4.  729
5.  728

Solution : 215

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Q25. **The number of ways in which six boys and six girls can be seated in a row for a photograph so that no two girls sit together is -.**

1.  (6!)2
2.  6! * ⁷P₆
3.  2(6!)
4.  6! * 7
5.  None of these

Solution : 6! * ⁷P₆
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