Home
Class 14
MATHS
The average of 10 items was found to be ...

The average of 10 items was found to be 80 but while calculating. one of the items was counted as 60 instead of 50. Then the correct average would have been—

A

79.5

B

69

C

79.25

D

79

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • PRACTICE SET-8

    UPKAR PUBLICATION |Exercise PART-III QUANTITATIVE APTITUDE |39 Videos

  • PROBABILITY

    UPKAR PUBLICATION |Exercise QUESTION BANK|110 Videos

Similar Questions

Explore conceptually related problems

The average of 100 items was found to be 30. If at the time of calculation, two items were wrongly taken as 32 and 12 instead of 23 and 11, then the correct average is:

The mean of 100 items was found to be 30. If at the time of calculation two items were wrongly taken as 32 and 12 instead of 23 and 11, find the correct mean.

The mean of 100 items was found to be 30. If at the time of calculation, two items were wrongly taken as 32 and 12 instead of 23 and 11, the correct mean is

The average marks obtained by a student in 6 subjects is 88. On subsequent verification it was found that the marks obtained by him in a subject was wrongly copied as 86 instead of 68. The correct average of the marks abtained by him is

The mean of 100 observations was calculated as 40. It was found later on that one of the observations was misread as 83 instead of 53 The correct mean is

The mean of 100 items was found to be 64. Later on it was discovered that two items were misread as 26 and 9 instead of 36 and 90 respectively. The correct mean is

UPKAR PUBLICATION -PRACTICE SET-9-Part- III (Quantative Aptitude )
  1. A profit of 10% is made after giving a discount of 5% in a T.V. If the...

    Text Solution

    |

  2. While selling to the retailer, a company allows 30% discount on the ma...

    Text Solution

    |

  3. The average of 10 items was found to be 80 but while calculating. one ...

    Text Solution

    |

  4. A man bought a horse and a carriage for 40,000. He sold the horse at a...

    Text Solution

    |

  5. If the diameter of a circle is increased by 8%. then its area is incre...

    Text Solution

    |

  6. A train covers a certain distance in 210 minute at a speed of 60 kmph ...

    Text Solution

    |

  7. The value of (sqrt(4^(3) + 15^(2)))^(3) is :

    Text Solution

    |

  8. By selling 4 articles for 1 rupee, a man loses 4%. Had he sold three a...

    Text Solution

    |

  9. If 5.5 of a= 0.65 of b, then a : b is equal to—

    Text Solution

    |

  10. An article is sold at a loss of 10%. Had it been sold for 90 more, the...

    Text Solution

    |

  11. A contractor undertook to finish a work in 92 days and employed 110 me...

    Text Solution

    |

  12. From a class of 42 boys, a boy aged 10 years goes away and in his plac...

    Text Solution

    |

  13. What is to be added to 15% of 160 so that the sum may be equal to 25% ...

    Text Solution

    |

  14. Two trains start from station A and B and travel towards each other at...

    Text Solution

    |

  15. The bar diagram below shows the production of patatoes (in quintal) fr...

    Text Solution

    |

  16. The bar diagram below shows the production of potatoes (in quintals) f...

    Text Solution

    |

  17. If the ratio of two numbers is 2 : 1 and their product is 1800, then t...

    Text Solution

    |

  18. In a lake, there are 10 steps labelled using alphabets from A to J. St...

    Text Solution

    |

  19. In a family there are several brothers and sisters. Every 2 boys have ...

    Text Solution

    |

  20. Rohan ranks seventh from the top and twenty-sixth from the bottom in a...

    Text Solution

    |