Home
Class 11
MATHS
The number of positive intergers satisfy...

The number of positive intergers satisfying the in-equality `""^(n+1)C_(n-2)-""^(n+1)C_(n-1)le100`, is

A

6

B

8

C

5

D

none of these

Text Solution

AI Generated Solution

To solve the inequality \(\binom{n+1}{n-2} - \binom{n+1}{n-1} \leq 100\), we will follow these steps: ### Step 1: Rewrite the Combinations Using the property of combinations, we know that: \[ \binom{n+1}{n-2} = \binom{n+1}{3} \quad \text{and} \quad \binom{n+1}{n-1} = \binom{n+1}{2} \] Thus, we can rewrite the inequality as: ...
Promotional Banner

Topper's Solved these Questions

  • PERMUTATIONS AND COMBINATIONS

    OBJECTIVE RD SHARMA ENGLISH|Exercise Section I - Solved Mcqs|111 Videos
  • PERMUTATIONS AND COMBINATIONS

    OBJECTIVE RD SHARMA ENGLISH|Exercise Section II - Assertion Reason Type|9 Videos
  • PARABOLA

    OBJECTIVE RD SHARMA ENGLISH|Exercise Chapter Test|30 Videos
  • PROBABILITY

    OBJECTIVE RD SHARMA ENGLISH|Exercise Chapter Test|45 Videos

Similar Questions

Explore conceptually related problems

The number of positive integers satisfying the inequality C(n+1,n-2)-C(n+1,n-1)<=100 is

The number of positive integers satisfying the inequality C(n+1,n-2) - C(n+1,n-1)<=100 is

The least positive integer n for which ""^(n-1)C_(5)+""^(n-1)C_(6) lt ""^(n)C_(7) is

The number of ordered pairs of positive integers (m,n) satisfying m le 2n le 60 , n le 2m le 60 is

For all positive integers n , show that \ ^(2n)C_n+\ ^(2n)C_(n-1)=1/2(\ ^(2n+2)C_(n+1)) .

For all positive integers n , show that \ ^(2n)C_n+\ ^(2n)C_(n-1)=1/2(\ ^(2n+2)C_(n+1)) .

If m,n,r are positive integers such that r lt m,n, then ""^(m)C_(r)+""^(m)C_(r-1)""^(n)C_(1)+""^(m)C_(r-2)""^(n)C_(2)+...+ ""^(m)C_(1)""^(n)C_(r-1)+""^(n)C_(r) equals

If ""^(n)C _r denotes the numbers of combinations of n things taken r at a time, then the expression ""^(n) C_(r+1) +""^(n)C_(r-1) +2 xx ""^(n)C_r equals

If ""^(n)C _r denots the numbers of combinations of n things taken r at a time, then the expression ""^(n) C_(r+1) +""^(n)C_(r-1) +2 xx ""^(n)C_r equals ""^(n+2) C_(r+1)

If ""^(n)C _4 denots the numbers of combinations of n things taken r at a time, then the expression ""^(n) C_(r+1) +""^(n)C_(r-1) +2 xx ""^(n)C_r equals ""^(n+2)C_(r+1)

OBJECTIVE RD SHARMA ENGLISH-PERMUTATIONS AND COMBINATIONS-Chapter Test
  1. The number of positive intergers satisfying the in-equality ""^(n+1)C(...

    Text Solution

    |

  2. 7 women and 7 men are to sit round a circulartable such that there is ...

    Text Solution

    |

  3. There are (n+1) white and (n+1) black balls, each set numbered 1ton...

    Text Solution

    |

  4. 12 persons are to be arranged to a round table. If two particular pers...

    Text Solution

    |

  5. The number of committees of 5 persons consisting of at least one femal...

    Text Solution

    |

  6. The number of ways in which a team of eleven players can be selected f...

    Text Solution

    |

  7. In a football championship, 153 matches were played. Every two-team pl...

    Text Solution

    |

  8. How many numbers between 5000 and 10,000 can be formed using the digit...

    Text Solution

    |

  9. If x, y and r are positive integers, then ""^(x)C(r)+""^(x)C(r-1)+""^(...

    Text Solution

    |

  10. In how many ways can 5 red and 4 white balls be drawn from a bag conta...

    Text Solution

    |

  11. All the letters of the word 'EAMCET' are arranged in all possible ways...

    Text Solution

    |

  12. There are 10 lamps in a hall. Each one of them can be switched on i...

    Text Solution

    |

  13. How many 10-digit numbers can be formed by using digits 1 and 2

    Text Solution

    |

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

    Text Solution

    |

  15. about to only mathematics

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |