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If N is the number of ways in which ...

If `N` is the number of ways in which a person can walk up a stairway which has 7 steps if he can take 1 or 2 steps up the stairs at a time then the value of `N//3` is _______.

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CENGAGE ENGLISH-PERMUTATIONS AND COMBINATIONS-All Questions
  1. Let Tn denote the number of triangles, which can be formed using t...

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

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  3. If N is the number of ways in which a person can walk up a stairwa...

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  4. If ^nCr=84 ,^n C(r-1)=36 ,a n d^n C(r+1)=126 , then find the value of...

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  5. Column I Column II Total number of function f:{1,2,3,4,5}vec{1,2...

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  6. find 7C4

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  7. A function is defined as f:[a1, a2, a3, a4, a5, a6]vec{b1, b2, b3}dot ...

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  8. Find the number of ways in which 22 different books can be given to 5 ...

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  9. Consider the convex polygon, which has 35 diagonals. Then match the ...

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  10. Find 5C0

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  11. Consider a 6xx6 chessboard. Then match the following columns. Column I...

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  12. Find the number of integral solutions of x1+x2+x3+=24 subjected to th...

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  13. Among 10 persons, A, B, C are to speak at a function. The number of...

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  14. In how many ways can three persons, each throwing a single dice once, ...

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  15. In how many ways can a team of 11 players be formed out of 25 playe...

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  16. Find the number of positive integral solutions of the inequality 3x+y+...

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  17. Statement 1: the number of ways in which n persons can be seated a...

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  18. How many integers between 1 annd 1000000 have the sum of the digit equ...

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  19. Statement 1: Number of terms in the expansion of (x+y+z+w)^(50) is .^(...

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  20. Find the number of seven letter words that can be formed by using the ...

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