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There are 3 group of students, each containing 25, 50 and 25 students respectively. The mean marks obtained by the first two groups are 60 and 55. The combined mean of all the three groups is 58. What is the mean of the marks scored by the third group? (a) 52    (b) 57    (c) 58    (d) 60    (e) 62

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RS AGGARWAL-AVERAGE-All Questions
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  10. The average height of 35 girls in a class was calculated as 160 cm....

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  13. The average of 10 numbers is 40.2. Later it is found that two numbe...

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  14. A pupil’s marks were wrongly entered as 83 instead of 63. Due to th...

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  15. While calculating the average of a batsman as 36 in 100 matches tha...

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  17. The average of five numbers is 306.4. The average of the first two ...

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  18. The average marks obtained by 22 candidates in an examination is 45...

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  19. The average of 11 numbers is 10.9. If the average of the first six ...

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  20. The average temperature for the first four days of a week is 40. 2o...

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