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There are 40 students in a class, out of...

There are 40 students in a class, out of them 15 are boys. The mean of marks obtained by boys is 33 and that for girls is 35. Find out the mean of all students in the class.

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CHETANA PUBLICATION-STATISTICS-Exercise
  1. There are 40 students in a class, out of them 15 are boys. The mean of...

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  2. Which of the following data is not primary?

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  3. What is the upper class limit for the class 15-35?

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  4. What is the class mark of class 25-35?

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  5. If the classes are 0-10, 10-20,20-30… then in which class should the o...

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  6. The mean of five numbers is 50, out of which mean of 4 numbers is 46, ...

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  7. mean of 100 observations is 40. The 9 observation is 30. If this is re...

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  8. What is the mode of 19, 19, 15, 20, 25, 15, 20, 15?

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  9. What is the median of 7, 10, 7, 5, 9, 10?

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  10. From following table, what is the cumulative frequency of less than ty...

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  11. The mean of the data 87, 92, 63, 78, 92, 59, 72, 66, is……..

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  12. The mark of a class test are given below 28, 26,17, 12, 14, 19, 27, 26...

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  13. The mode of 18, 14, 22, 23, 14, 18, 17, 18, 28, 28, 14, 25, 14 is……………

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  14. The mean of eleven number is 47. If a number is added then the mean is...

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  15. A cricket player scored run in different matches as follows : 36, 41, ...

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  16. Classify following information as primary data or secondary data. Numb...

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  17. Classify following information as primary data or secondary data.Numbe...

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  18. Classify following information as primary data or secondary data.Elect...

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  19. Classify following information as primary data or secondary data.Elect...

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  20. Classify following information as primary data or secondary data. Lete...

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  21. All 30 members of a 'Nature Club' in a school planted trees in the fou...

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