Home
Class 12
MATHS
Average score of 30 students in a class ...

Average score of 30 students in a class is 34. Later on it was found that the score 13 was incorrectly recorded as 73. The correct average score is

A

2150

B

50

C

32

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • STATISTICS

    ARIHANT PUBLICATION BIHAR|Exercise EXAM BOOSTER (FOR CRACKING EXAM)|25 Videos

  • SIMPLE INTEREST AND COMPOUND INTEREST

    ARIHANT PUBLICATION BIHAR|Exercise Exam Booster for Cracking Exam|25 Videos

  • TAXATION

    ARIHANT PUBLICATION BIHAR|Exercise EXAM BOOSTER FOR CRACKING EXAM |14 Videos

Similar Questions

Explore conceptually related problems

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

In a class, the average score of thirty students on a test is 69. Later on it was found that the score of one student was wrongly read as 88 instead of 58. The actual average score is: एक कक्षा में, किसी परीक्षा में तीस छात्रों का औसत अंक 69 है | बाद में, यह पाया गया कि एक छात्र का अंक गलती से 58 के बजाय 88 दर्ज कर लिया गया था | वास्तविक औसत अंक कितना है ?

The mean of the marks scored by 40 students was found to be 35. Later on it was discovered that a score of 43 was misread as 34. The correct mean is

The mean of marks scored by 100 students was found to be 40. Later on it was discovered that a score of 53 was misread as 83. Find the correct mean.

The mean of the marks scored by 50 students was found to be 39 later on,it was observed that a score was 43 was misread as 23 find the correct mean.

The average marks of a student in 10 papers are 80. If the heighest and the lowest score are not considered the average is 81. If his heighest score is 92. Find the lowest score.

Average score of a class of 60 students, in an exam, was 43. Average score of the students who had passed is 52 and the average score of students who had failed is 16. How many failed the exam? (a) 25 (b) 20 (c) 15 (d) 18

The average score of 84 students (boys and girls) in a test is 57 . The ratio of the number of boys to that of girls is 10 : 11 . The average score of boys is 20% less than that of girls. What is the average score of girls in the test?

The average score of 42 students in a test is 69. The ratio of the number of boysto that of girls is 10 : 11. The average score of the boys is 20% more than that of the girls. The average score of the boys is :

ARIHANT PUBLICATION BIHAR-STATISTICS-EXAM BOOSTER (FOR CRACKING EXAM)
  1. The mid value of a class interval is 40. If the class size is 10, then...

    Text Solution

    |

  2. If the mean of five observations x,(x+1),(x+2)(x+5) and (x+7) is 11, t...

    Text Solution

    |

  3. The standard deviation for the data 7, 11, 15 is

    Text Solution

    |

  4. Consider the table given below The arithmetic mean of the marks ...

    Text Solution

    |

  5. The mean deviation of the following distribution is

    Text Solution

    |

  6. In a class of 40 students, 10 have failed and their average marks are ...

    Text Solution

    |

  7. If the mean of the following data is 13.5, then the value of p is

    Text Solution

    |

  8. The mean of the values of 1, 2, 3, ... x with respective frequencies y...

    Text Solution

    |

  9. A distribution consists of three components with frequencies 45, 40 an...

    Text Solution

    |

  10. The value of median from the following data is

    Text Solution

    |

  11. Read the following pie diagrams carefully and answer the questions tha...

    Text Solution

    |

  12. Read the following pie diagrams carefully and answer the questions tha...

    Text Solution

    |

  13. Read the following pie diagrams carefully and answer the questions tha...

    Text Solution

    |

  14. Read the following pie diagrams carefully and answer the questions tha...

    Text Solution

    |

  15. Read the following pie diagrams carefully and answer the questions tha...

    Text Solution

    |

  16. Read the following pie diagrams carefully and answer the questions tha...

    Text Solution

    |

  17. Average score of 30 students in a class is 34. Later on it was found t...

    Text Solution

    |

  18. A candidate obtains the marks in subjects, English 40, Hindi 30, Mathe...

    Text Solution

    |

  19. The mean of the squares of the numbers 1,2,3,4, cdots n is

    Text Solution

    |

  20. If the variance of a data is 289, then the standard deviation is

    Text Solution

    |