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The following table shows the number ...

The following table shows the number of working hours and the number of employees employed in a small scale industry. No. of working hours                                             No. of employees 3 – 5                                         7 5 – 7                                               10 7 – 9                                               18 9 – 11                                               57 11 – 13                                               14 13 – 15                                     8 The average number of working hours of an employee is (a) 8.5       (b) 9.5      (c) 10.5      (d) None of these

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RS AGGARWAL-AVERAGE-All Questions
  1. The arithmetic mean of 15 numbers is 41.4. Then the sum of these nu...

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  2. If 25 a+25 b=115 , what is the average of a and b ? (a) 2.5 (b) ...

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  3. The following table shows the number of working hours and the numbe...

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  4. If the arithmetic mean of 0, 5, 4, 3 is a , that of -1,\ 0,\ 1,\ 5,...

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  5. Kunal bought 65 books for Rs 1050 from one shop and 50 books for Rs...

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  6. The average of the reciprocals of x and y is (a) ((x+y))/((x-y)) (b) (...

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  7. The average of two numbers is X Y . If one number is X , the oth...

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  8. There are five boxes in a cargo hold. The weight of the first box i...

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  9. In Arun’s opinion, his weight is greater than 65 kg but less than 7...

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  10. The average of 20 numbers is zero. Of them, at the most, how many m...

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  11. The mean of the first ten even natural numbers is (a) 9         (b)...

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  12. The arithmetic mean of first 11 natural numbers is (a) 5        (b)...

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  13. Find the average of all the numbers between 6 and 34 which are divi...

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  14. The average of the first five multiples of 3 is (a) 3         (b) 9...

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  15. The average of the first nine prime numbers is (a) 9 (b) 11 (c) 11 ...

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  16. A student was asked to find the arithmetic mean of the numbers 3, 1...

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  17. The average of 2, 7, 6 and x is 5 and the average of 18, 1, 6, x...

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  18. The total marks obtained by a student in Physics, Chemistry and Mat...

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  19. The average of the first 100 positive integers is (a) 49.5     (...

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  20. The average of odd numbers up to 100 is (a) 49      (b) 49.5     (c...

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