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The mean of 53 observations is 36. Out o...

The mean of 53 observations is 36. Out of these observations, the mean of first 27 observations is 32 and that of the last 27 observations is 40. The 27th observation is

A

23

B

36

C

38

D

40

Text Solution

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The correct Answer is:
B
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MTG IIT JEE FOUNDATION-STATISTICS-Exercise (Multiple Choice Question)
  1. The mean of the marks scored by 40 students was found to be 35. Later ...

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  2. The mean of 90 items was found to be 45. Later on it was discovered th...

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  3. The mean of 53 observations is 36. Out of these observations, the mean...

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  4. There are 50 numbers. Each number is subtracted from 43 and the mean o...

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  5. The median of the numbers 9, 5, 7, 17, 13, 18, 13, 9, 5, 17, 13, 12, 1...

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  6. The median of the numbers 45, 34, 65, 48, 93, 54, 22, 86, 45, 87 is

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  7. Mode of the data 51, 14, 71, 15, 91, 2, 51, 19, 41, 51, 18, 15, 51 is

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  8. For drawing a frequency polygon of a continuous frequency distribution...

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  9. The marks obtained by 20 students of a class in a test (out of 50) are...

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  10. The class mark of the class 150 - 170 is

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  11. The mean of eight numbers is 40. If one number is excluded, their mean...

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  12. The median of the data arranged in ascending order 8, 9, 12, 18, (x + ...

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  13. The points scored by a kabaddi team in a series of matches are as foll...

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  14. The marks obtained by 12 students of a class in a test are 36, 27, 5, ...

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  15. Find the mean of the following distribution:

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  16. The class marks of a frequency distribution are 104, 114, 124, 134, 14...

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  17. Find the mean of the following marks of 20 students on a screening tes...

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  18. The maximum temperatures (in degree celcius) for a city in North India...

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  19. The mean of 100 observations is 50. If one of the observations which w...

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  20. The mean weight of 60 students of a class is 52.75 kg. If mean weight ...

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