Home
Class 12
MATHS
The mean marks of 100 students were foun...

The mean marks of 100 students were found to be 40.Later on it was discovered that a score of 53 was misread as 83. The corrected mean corresponding to the corrected score is: (a) `37.5` (b) `35.6`(c) `39.7` (d) `38.7`

A

`37*5`

B

`35*6`

C

`39*7`

D

`38*7`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • MEASURES OF CENTRAL TENDENCY

    ML KHANNA|Exercise Problem Set (1) (Measures of Disperation) |23 Videos

  • MEASURES OF CENTRAL TENDENCY

    ML KHANNA|Exercise SELF ASSESSMENT TEST |5 Videos

  • MEASURES OF CENTRAL TENDENCY

    ML KHANNA|Exercise ASSERTION / REASON|1 Videos

  • MAXIMA AND MINIMA

    ML KHANNA|Exercise MISCELANEOUS EXERCISE (COMPREHENSION)|3 Videos

  • NUMERICAL METHODS

    ML KHANNA|Exercise SELF ASSESSMENT TEST|10 Videos

Similar Questions

Explore conceptually related problems

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 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 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 mean of 40 numbers was found to be 38. Later on, it was detected that a number 56 was misread as 36. find th correct mean of the given numbers.

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

The mean of 100 iterms 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. Find the correct mean.

Mean of 50 observations was found to be 80.4. But later on, it was discovered that 96 was misread as 69 at one place. Find the correct mean.

The mean of 90 items was found to be 45. Later on it was discovered that two items were misread as 26 and 19 instead of 62 and 09 respectively. The correct mean is

Mean marks obtained by 100 students are estimated to be 40. Later on its is found that one value was read as 83 instead of 53. Find out the ''corrected'' mean.

ML KHANNA-MEASURES OF CENTRAL TENDENCY -Problem Set (1) (Measures of Central Tendency)
  1. The algebraic sum of the deviations of xi/fi from the mean is:

    Text Solution

    |

  2. The sum of squares of deviations of a set of values about the mean is ...

    Text Solution

    |

  3. The mean marks of 100 students were found to be 40.Later on it was dis...

    Text Solution

    |

  4. The median of the following items 25,15,23,40,27,25,23,25 and 20 is

    Text Solution

    |

  5. The median of the variables x+4,x-7//2,x-5//2x-3,x-2,x+1//2,x-1//2,x+5...

    Text Solution

    |

  6. The algebraic sum of deviations of ten observations about 15 is 70. Th...

    Text Solution

    |

  7. A distribution has mean =8*7, median =8*5 and mode =7*3. The distribut...

    Text Solution

    |

  8. The average of daily wages for the workers of the two factories combin...

    Text Solution

    |

  9. Marks obtained by four students are : 25, 35, 45, 55. The average de...

    Text Solution

    |

  10. The quartile deviation of the income of a certain person given in rupe...

    Text Solution

    |

  11. The weighted mean of first n natural numbers whose weights are equal t...

    Text Solution

    |

  12. The arithmetic mean of n numbers of a series is bar(x). The sum of the...

    Text Solution

    |

  13. If a variate takes values a, ar,ar^(2),..ar^(n-1) which of the relatio...

    Text Solution

    |

  14. A population of values is symmetrically distributed about the constant...

    Text Solution

    |

  15. The geometric mean of the series 1,2,4,8,16,....,2^n is

    Text Solution

    |

  16. An aeroplane flies round a square, the sides of which measure 100 mile...

    Text Solution

    |

  17. A group of 10 items has arithmetic mean 6. If the arithmetic mean of 4...

    Text Solution

    |

  18. If the mean of a variate x is m, the mean of (ax+b)/(c ) where a,b,c a...

    Text Solution

    |

  19. The numbers 3,5,7,4 have frequencies x,x+4,x-3,x+8. If their arithmeti...

    Text Solution

    |

  20. If the mean of a set of observations x(1),x(2), …,x(n)" is " bar(X), t...

    Text Solution

    |