Home
Class 14
MATHS
Average marks of 100 students of a class...

Average marks of 100 students of a class is 58. Later it was found that 86 was mistakenly written as 68. Find the actual average.

A

58.18

B

57.82

C

58.81

D

57.28

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • AVERAGE

    KIRAN PUBLICATION|Exercise TYPE-VI|13 Videos

  • AVERAGE

    KIRAN PUBLICATION|Exercise TYPE-VII|22 Videos

  • AVERAGE

    KIRAN PUBLICATION|Exercise TYPE-IV|10 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

Average marks of maths of 5 students is 50. Later it was found that 48 was mistakenly reworded as 84. Find the actual average

Average score of 50 students in a class is 44. Later on it was found that the score 23 was incorrectly recorded as 73 . The correct average score is

Average marks of 40 students is 72. Three numbers 64, 62 & 84 were mistakenly read as 68, 65, 73 respectively. Find the actual average.

Average price of f 100 articles is 46. Later it was found that 16 was read as 61 and 43 was read as 34 and the articles were 90 instead of 100. Find the actual average.

The average marks of 50 students of a class is 76. If the average marks of all boys is 70 and that of all girls is 80 in that class, then find the number of boys in the class.

In an exam, the average marks of 40 students is 75. Afterwards, it is found that the marks of 2 students are taken wrong as 56 and 38 instead of 65 and 69. Find the correct average.

The average marks of 42 students in an examination, was 64. Later it was found that the marks of three students were misread as 72, 58 and 44 instead of the actual marks 64, 42 and 26 respectively. What is the correct average marks?

KIRAN PUBLICATION-AVERAGE-TYPE-V
  1. The average of six numbers is 20. If one number is removed, the averag...

    Text Solution

    |

  2. The average of 25 observations is 13. It was later found that an obser...

    Text Solution

    |

  3. While finding the average of 10 given numbers, a student, by mistake, ...

    Text Solution

    |

  4. A boy found that the average of 20 numbers is 35 when he writes a numb...

    Text Solution

    |

  5. A student finds the average of ten 2-digit numbers. While copying numb...

    Text Solution

    |

  6. The average marks obtained by a student in 6 subjects is 88. On subseq...

    Text Solution

    |

  7. Average marks of 100 students of a class is 58. Later it was found tha...

    Text Solution

    |

  8. Average price of f 100 articles is 46. Later it was found that 16 was ...

    Text Solution

    |

  9. In an exam, the average marks obtained by the students was found to be...

    Text Solution

    |

  10. The average marks of 40 students in an examination was 25. It was late...

    Text Solution

    |

  11. The average weight of 20 students in a class is increased by 0.75 kg w...

    Text Solution

    |

  12. There are 50 students in a class. One of them weighing 50 kg goes away...

    Text Solution

    |

  13. The average weight of 12 crewmen in a boat is increased by 1/3 kg, wh...

    Text Solution

    |

  14. The average marks obtained by 22 candidates in an examination are 45. ...

    Text Solution

    |

  15. The mean of 20 items is 55. If two items 45 and 30 are removed, the ne...

    Text Solution

    |

  16. The average marks obtained by 40 students of a class is 86. If the 5 h...

    Text Solution

    |

  17. The average marks of 50 students in an examination was 65. It was late...

    Text Solution

    |

  18. The average of 50 results was calculated as 30 but later it was found ...

    Text Solution

    |

  19. The average of 45 results was calculated as 27 but later it was found ...

    Text Solution

    |

  20. In class IX. the average marks of 6 students In science were 48. After...

    Text Solution

    |