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about to only mathematics...

about to only mathematics

A

6

B

18

C

12

D

9

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The correct Answer is:
B
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check whether it is statement or not .Do you like mathematics ?

OBJECTIVE RD SHARMA ENGLISH-PERMUTATIONS AND COMBINATIONS-Chapter Test
  1. How many 10-digit numbers can be formed by using digits 1 and 2

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  2. The straight lines I(1),I(2),I(3) are parallel and lie in the same pla...

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  3. about to only mathematics

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  4. The number of diagonals that can be drawn by joining the vertices of a...

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  5. The sum of the digits in unit place of all the numbers formed with the...

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  6. In an examinations there are three multiple choice questions and each ...

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  7. There are 10 points in a plane, out of these 6 are collinear. If N is ...

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  8. Ramesh has 6 friends. In how many ways can be invite one or more of th...

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  9. If Pm stands for ^m Pm , then prove that: 1+1. P1+2. P2+3. P3++ndotPn=...

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  10. The number of ways four boys can be seated around a round talble in fo...

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  11. We are required to form different words with the help of the letters o...

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  12. A candidate is required to answer 6 out of 10 questions, which are ...

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  13. The number of ways in which 6 men and 5 women can dine at a round tabl...

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  14. A students is to answer 10 out of 13 questions in an examminations suc...

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  15. Write the number of all possible words that can be formed using the ...

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  16. In a group of boys, two boys are brothers and six more boys are pres...

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  17. Nishi has 5 coins, each of the different denomination. Find the number...

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  18. Write the number of ways in which 5 boys and 3 girls can be seated in ...

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  19. How many different nine-digit numbers can be formed from the digits of...

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  20. The number of 4 digit even numbers that can be formed using 0, 1, 2, 3...

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