Home
Class 12
MATHS
If 8^(th) of an A.P. is 15 , then the su...

If `8^(th)` of an A.P. is 15 , then the sun of first
15 terms is

A

`180`

B

210

C

225

D

240

Text Solution

Verified by Experts

The correct Answer is:
3
Promotional Banner

Topper's Solved these Questions

  • SEQUENCES AND SERIES

    AAKASH INSTITUTE|Exercise Assignment (SECTION - B) One option is correct|50 Videos

  • SEQUENCES AND SERIES

    AAKASH INSTITUTE|Exercise Assignment (SECTION - C) More than one option are correct|11 Videos

  • SEQUENCES AND SERIES

    AAKASH INSTITUTE|Exercise Try Yourself|85 Videos

  • RELATIONS AND FUNCTIONS

    AAKASH INSTITUTE|Exercise Assignment (Section - J) Aakash Challengers Questions|8 Videos

  • SETS

    AAKASH INSTITUTE|Exercise SECTION-I(Aakash Challengers Questions)|5 Videos

Similar Questions

Explore conceptually related problems

7^(th) term of an A.P. is 40. Then, the sum of first 13 terms is

Let 2^("nd"),8^("th") and 44^("th") terms of a non-constant A.P. be respectively the 1^("st"),2^("nd") and 3^("rd") terms of a G.P.If the first term of the A.P. is 1 ,then the sum of its first 20 terms is equal to -

If the first term of an A.P. is 3 and the sum of its first 25 terms is equal to the sum of its next 15 terms, then the common difference of this A.P. is:

If sum of 4^( th ) . 7^( th ) & 10^( th ) term of an A .P .is 15 ,then sum of first thirteen terms of same A.P.is

The sum of first 8 terms of an A.P. is 64 and that of first 15 terms is 225. Find the sum of its first 17 terms.

The sum of the 4th and 8th terms of an AP is 24 and the sum of its 6th and 10th terms is 44. Find the first terms of the AP.

The first term of an A.P. is 3.The sum of first 25 terms is equal to the sum of next 15 terms.Find the common difference of the A.P.

The 7^(th) term of an A.P. is 5 times the first term and its 9^(th) term exceeds twice the 4^(th) term by 1 . The first term of the A.P. is

The sum of 4 th and 8 th terms of an A.P.is 4 and the sum of the 6 th and 10 th terms is 34 . Find the first term and the common difference of the A.P.

If 11^(th) term of an A.P. Is 38 and 16th term is 73, its first term is :

AAKASH INSTITUTE-SEQUENCES AND SERIES -Assignment (SECTION - A) One option is correct
  1. If a, b, c, d, e, f are in AP, then (e-c) is equal to which one of the...

    Text Solution

    |

  2. The m^(th) term of an A.P. is n and n^(th) term is m its p^(th) ...

    Text Solution

    |

  3. If 8^(th) of an A.P. is 15 , then the sun of first 15 terms is

    Text Solution

    |

  4. If a(1),a(2),a(3),………. are in A.P. such that a(1) + a(5) + a(10) + a(1...

    Text Solution

    |

  5. The first and last terms of an A.P. are 1 and 7 . If the sum of its...

    Text Solution

    |

  6. If the sum of n terms of an A.P., is 3n^2+5n then which of its terms i...

    Text Solution

    |

  7. In an A.P., if common difference is 2, sum to n terms is 49, 7th term ...

    Text Solution

    |

  8. The sum of all 2 digit odd numbers is

    Text Solution

    |

  9. The sum of all 2 digit odd numbers is

    Text Solution

    |

  10. The number of numbers lying between 81 and 1792 which are divisible by...

    Text Solution

    |

  11. Three number are in A.P. such that their sum is 24 and sum of thei...

    Text Solution

    |

  12. If four numbers in A.P. are such that their sum is 50 and the great...

    Text Solution

    |

  13. If the sum of p terms of an A.P. is q and the sum of q terms is p, the...

    Text Solution

    |

  14. If (3+5+7+ u p tont e r m s)/(5+8+113 u p to10t e r m s)=7, then find...

    Text Solution

    |

  15. How many terms of the series 54,51, 48,.. be taken so that their sum i...

    Text Solution

    |

  16. There are n A.M.s between 3 and 17. The ratio of the last mean to the ...

    Text Solution

    |

  17. n A.M.\'s are inserted between 1 and 31 such that the ratio of the 7th...

    Text Solution

    |

  18. Four numbers are in arithmetic progression.The sum of first and last t...

    Text Solution

    |

  19. If the sum of three numbers which are in A.P is 27 and the product of ...

    Text Solution

    |

  20. If n arithmetic means are inserted between 2 and 38, then the sum of t...

    Text Solution

    |