Aptitude  Permutations  Practice Q&A

1. In how many different ways can the letters of the word DETAIL be arranged in such a way that the vowels occupy only the odd positions?

32 48 36 60

2. A box contains 2 white balls, 3 black balls and 4 red balls. In how many ways can 3 balls be drawn from the box, if at least one black ball is to be included in the draw?

32 48 64 96

3. How many 3-digit numbers can be formed from the digits 2, 3, 5, 6, 7 and 9, which are divisible by 5 and none of the digits is repeated?

5 10 15 20

4. Out of 7 consonants and 4 vowels, how many words of 3 consonants and 2 vowels can be formed?

210 1050 25200 21400

5. In how many ways can the letters of the word LEADER be arranged?

72 144 360 720

6. How many 6 digit telephone numbers can be formed if each number starts with 35 and no digit appears more than once?

720 360 1420 1680

7. In how many different ways can the letters of the word LEADING be arranged in such a way that the vowels always come together?

360 480 720 5040

8. An event manager has ten patterns of chairs and eight patterns of tables. In how many ways can he make a pair of table and chair?

100 80 110 64

9. In how many different ways can 5 girls and 5 boys form a circle such that the boys and the girls alternate?

2880 1400 1200 3212

10. How many words can be formed by using all letters of the word BIHAR?

720 24 120 60

 

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Total Ans

 

 

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