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The average of 35 consecutive natural nu...

The average of 35 consecutive natural numbers is N. Dropping the first 10 numbers and including the next 10 numbers, the average is changed to M. If the value of `M^2 - N^2`= 600 , then the average of 3M and 5N is:

A

90

B

120

C

100

D

115

Text Solution

Verified by Experts

The correct Answer is:
D
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GAGAN PRATAP -AVERAGE-Multiple Choice Questions
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  2. The average of four consecutive odd natural numbers is eight less than...

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  3. The average of 35 consecutive natural numbers is N. Dropping the first...

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  4. The sum of 17 consecutive numbers is 289. The sum of another 10 consec...

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  5. Average of n numbers is a. The first number is Increased by 2, second ...

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  6. The average of 27 numbers is zero. Out of them, how many may be greate...

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  7. The average of 1088 real numbers is zero. At most how many of them can...

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  8. The mean of fifteen different natural numbers is 13. The maximum value...

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  9. If the arithmetic mean of 3a and 4b is greater than 50, and a is twice...

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  10. The average of three numbers a, b and c is 2 more than c. The average ...

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  11. The average monthly income (in Rs) of certain agricultural workers is ...

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  12. If A is (1)/(6) of C, and B is twice of A, and the average of A,B and ...

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  13. The average of the age of Sonu, Hari and Govind is 30 years. If their ...

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  14. Out of 6 numbers, the sum of the first 5 numbers is 7 times the 6th nu...

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  15. The average of the first four numbers is three times the fifth number....

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  16. The average of five positive numbers is 56. If the first number is thr...

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  17. The side of a square exceeds the side of another square by 4cm and the...

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  18. Of the three numbers, the average of the first and the second is great...

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  19. The average of a non-zero number, its square and its cube is 127 times...

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  20. The average of x, y and z is 45. x is as much more than the average as...

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