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The number of different seven digit numb...

The number of different seven digit numbers that can be written using only the three digit 1, 2 and 3 with the condition that the digit 2 occurs twice in each number is

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CENGAGE PUBLICATION-PERMUTATIONS AND COMBINATIONS-All Questions
  1. The number of ways in which we can select four numbers from 1 to 30...

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  2. The total number of three-letter words that can be formed from the ...

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  3. The number of different seven digit numbers that can be written using ...

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  4. The number of ways of arranging m positive and n(lt m+1) negative si...

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  5. The number of ways to fill each of the four cells of the table with a ...

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  6. A library has a copies of one book, b copies each of two books, c ...

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  7. Three boys of class X, four boys of class XI, and five boys of clas...

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  8. Number of ways in which 25 identical things be distributed among fi...

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  9. Number of ways in which Rs. 18 can be distributed amongst four pers...

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  10. 2m white counters and 2n red counters are arranged in a straight line ...

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  11. A person buys eight packets of TIDE detergent. Eachpacket contains one...

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  12. The number of ways in which 12 books can be put in three shelves wi...

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  13. The number of ways in which 12 books can be put in three shelves wi...

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  14. The total number of ways in which 2n persons can be divided into n ...

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  15. Let x1 , x2 , x3,....., xk be the divisors of positive integer n (inc...

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  16. Let A = {x1, x2, x3, ,x7},B={y1, y2, y3} The total number of func...

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  17. The total number of ways in which n^2 number of identical balls...

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  18. A committee of 12 is to be formed from nine women and eight men. In ho...

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  19. Let Tn denote of the number of triangles which can be formed using the...

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

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