Home
Class 11
MATHS
If ^nC3=56 and ^nP3=336, find n ....

If `^nC_3=56` and `^nP_3=336`, find n .

Promotional Banner

Topper's Solved these Questions

  • MODEL PAPER (11)

    JBD PUBLICATION|Exercise EXERCISE|39 Videos

  • MODEL PAPER (13)

    JBD PUBLICATION|Exercise EXERCISE|39 Videos

Similar Questions

Explore conceptually related problems

If "^(2n)C_3 : ^nC_2= 12: 1 , find n .

If nC_6=nC_2 , find ^nC_2 .

If .^nP_r=840, .^nC_r=35, then find n=

If "^nC_8= ^nC_2 , find "^nC_2 .

If "^(n-1)C_r : ^nC_r : ^(n+1)C_r= 6:9: 13 , find n and r.

If .^(m+n) P_(2)=56 and .^(m-n)P_(3)=24 , then (.^(m)P_(3))/(.^(n)P_(2)) equals

If ^nC_(r-1)=36 , ^nC_r=84 and ^nC_(r+1)=126 , then find ^rC_2 .

Find n if ""^nC_4 , ""^nC_5 and ""^nC_6 are in A.P.

If "^nC_8 = "^nC_2 , find "^nC_2 .

If three successive coefficients in the expansion of (1+x)^n are 28, 56 and 70, find n.

JBD PUBLICATION-MODEL PAPER (12)-EXERCISE
  1. Show tha: cos6A=32cos^6A-48cos^4A+18cos^2A-1

    Text Solution

    |

  2. 1^2+2^2+3^3+.....+n^2=(n(n+1)(2n+1))/(6)

    Text Solution

    |

  3. If ^nC3=56 and ^nP3=336, find n .

    Text Solution

    |

  4. The English alphabet has 5 vowels and 21 consonants. How many words wi...

    Text Solution

    |

  5. The sum of two numbers is 6 times their G.M. show that numbers are in ...

    Text Solution

    |

  6. Between 1 and 31, n A.M's have been inserted in sucha a way that the r...

    Text Solution

    |

  7. In which ratio is the line joining the points (1,3) and (2,7) is divid...

    Text Solution

    |

  8. Find the equation of hyperbola whose foic are (0, pm12) and length of ...

    Text Solution

    |

  9. Evaluate:underset(xrarr0)lim (1-cos2x)/(3tan^2x)

    Text Solution

    |

  10. Differentiate: (acos x+bsinx+c)/(sinx) w.r.t.x.

    Text Solution

    |

  11. Three coins are tossed once. Find the probability of getting at least ...

    Text Solution

    |

  12. Three coins are tossed once. Find the probability of getting at most t...

    Text Solution

    |

  13. If (x + iy)^3 = u + iv, then show that u/x +v/y = 4(x^2 - y^2)

    Text Solution

    |

  14. Find the square root fo 1 - i.

    Text Solution

    |

  15. Find all pairs of consecutive odd positive integers both of which are ...

    Text Solution

    |

  16. Solve the given inequality -5 < (x - 2)/5 le 0

    Text Solution

    |

  17. Find underset(xrarr0)f(x) where f(x)={(2x+3, xle0),(3(x+1), x>0):}

    Text Solution

    |

  18. Find the derivative of (sin x + cos x) from the first principle.

    Text Solution

    |

  19. Find the mean deviation from mean:

    Text Solution

    |

  20. Find the mean for the following data: 13,17,16,14,11,13,10,16,18,12,17

    Text Solution

    |