Home
Class 14
MATHS
Average of n numbers is a. The first num...

Average of n numbers is a. The first number is Increased by 2, second one is increased by 4, the third one is Increased by 8 and so on. The average of the new numbers Is:

A

`a + (2^(n-1) -1)/2`

B

`a+ (2(2^(n) -1))/n`

C

`a+ (2^(n-1))/n`

D

`a + (2^(n) -1)/n`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • AVERAGE

    KIRAN PUBLICATION|Exercise TYPE-IV|10 Videos

  • AVERAGE

    KIRAN PUBLICATION|Exercise TYPE-V|24 Videos

  • AVERAGE

    KIRAN PUBLICATION|Exercise TYPE-II|51 Videos

  • ARITHMETICAL PROBLEMS

    KIRAN PUBLICATION|Exercise TYPE-X|32 Videos

  • BOAT AND STREAM

    KIRAN PUBLICATION|Exercise TEST YOURSELF |10 Videos

Similar Questions

Explore conceptually related problems

The average of 8 numbers is 12. If each number is increased by 2, the new average will be

The average of 12 numbers is 15. If each number is increased by 1, find the new average.

The average of n numbers is 42. If 75% of the numbers are increased by 4 each and the remaining numbers are decreased by 8 each, then what is the average of the numbers, so obtained?

If the first item is increased by 1, second by 2 and so on, then the new mean is

The average of three number is 77 . The first number is twice the second and the second number is twice the third. The first number is :

The average of three numbers is 77. The first number is twice the second and the second number is twice the third.The first number is

The average of six numbers is 32. If each of the first three numbers is increased by 2 and each of the remaining three numbers is decreased by 4, then find the new average.

KIRAN PUBLICATION-AVERAGE-TYPE-III
  1. The average of 15 numbers Is 7. If the average of the first 8 numbers ...

    Text Solution

    |

  2. The average of 8 numbers is 20. The average of first tow numbers is 15...

    Text Solution

    |

  3. The average of 20 numbers is 12. The average of the first 12 numbers i...

    Text Solution

    |

  4. Average of n numbers is a. The first number is Increased by 2, second ...

    Text Solution

    |

  5. The average temperature of the first 4 days of a week was 37°C and tha...

    Text Solution

    |

  6. In a certain year, the average monthly income of a person was Rs 3,400...

    Text Solution

    |

  7. The average of 8 numbers is 21. If each of the numbers is mulitl-plied...

    Text Solution

    |

  8. The average of 11 results is 50. If the average of the first six resul...

    Text Solution

    |

  9. The average of eight successive numbers is 6.5. The average of the sma...

    Text Solution

    |

  10. The average of three numbers is 135. The largest number is 195 and the...

    Text Solution

    |

  11. The average of two numbers is 8 and the average of other three numbers...

    Text Solution

    |

  12. Out of four numbers, the average of the first three is 15 and that of ...

    Text Solution

    |

  13. Three numbers are such that the average of first two numbers is 2, the...

    Text Solution

    |

  14. The average of the largest and smallest 3 digit numbers formed by 0, 2...

    Text Solution

    |

  15. The average of six numbers is 3.95. The average of two of them is 3.4,...

    Text Solution

    |

  16. Out of four numbers the average of the first three is 16 and that of t...

    Text Solution

    |

  17. The average of 16 numbers is 48. The average of the first 7 numbers is...

    Text Solution

    |

  18. The average of 22 numbers is 52. The average of the first 8 numbers is...

    Text Solution

    |

  19. The average of twelve numbers is 42. The average of the last five numb...

    Text Solution

    |

  20. The average of thirteen numbers is 80. The average of the first five n...

    Text Solution

    |