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The average sale of a car dealership ...

The average sale of a car dealership was 15 cars per week. After a promotional scheme the average sale increased to 21 cars per week. The percentage increase in the sale of cars was (a) 39.33% (b) 40% (c) `42 6/7%` (d) 140%

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RS AGGARWAL-AVERAGE-All Questions
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  4. The mean of 1^2,\ 2^2,\ 3^2,\ 4^2,\ 5^2,\ 6^2,\ 7^2 is (a) 10 (b) 2...

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  6. The average of a non-zero number and its square is 5 times the numb...

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  8. The arithmetic mean of the series 1, 2, 4, 8, 16, ..... 2^n is (2^n...

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  9. The average of two numbers is 6.5 and square root of their product ...

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  10. Of four numbers whose average is 60, the first is one-fourth of the...

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  11. The average of 4 positive integers is 59. The highest integer is 83...

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  12. The average of 7 consecutive numbers is 20. The largest of these nu...

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  13. The average of five consecutive odd numbers is 95. What is the four...

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  14. A ,\ B ,\ C and D are four consecutive even numbers respectively an...

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  15. The sum of the three consecutive even numbers is 44 more than the a...

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  16. The average marks of a student in 4 subjects is 75. If the student ...

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  17. The average age of the boys in a class is 16 years and that of the ...

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  18. The average annual income (in Rs) of certain agricultural workers i...

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  19. A family consists of grandparents, parents and three grandchildren....

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  20. A library has an average of 510 visitors on Sundays and 240 on othe...

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