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Out of three numbers, second is thrice t...

Out of three numbers, second is thrice the first while third is six times the second. If their average is 66. A new number 4 more than the average of other 3 is included then Find average of first and fourth number

A

A)38.5

B

B)38

C

C)39

D

D)39.5

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The correct Answer is:
D
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ADDA247-AVERAGE AND AGES-Prelims Questions (Level - 1)
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  2. Rohit scores 84 in Maths while 79 in Science. Karan scores 85 in Maths...

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  3. Average of sum of four consecutive even numbers is 10 more than the a...

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  4. B is twice as old as A. Average of present age of A and B is 24 years...

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  5. A cricketer had a certain average of runs in 80 innings. In his 81st ...

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  6. Average of four numbers is 45.5. Third number is 250% more than the s...

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  7. 3 years ago, ratio of age of A and B is 3:1. If the present age of B ...

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  8. If average of a 10 term A.P is 112.5% more than its first term then s...

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  9. The average of 'x' numbers is 24. If 1/4 of the numbers are increased...

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  10. The average weight of ten students of class is 40 kg. If the lightest...

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  11. Three years ago, average age of 'Amiť, 'Bittu' and 'Chitu' is 27 year...

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  12. The age of Ayushis 25% less than of Veer. The age of Veer is 24 years ...

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  13. Shivam's age is 4//5^(th) of Avinash's age while age of Avinash after ...

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  14. Four years ago, age of Veer is six years more than half of the age of...

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  15. S1 is the series of five consecutive numbers and average of first thr...

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  16. Average of present age of P & R is 33 years. Q is 18 years older than...

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  17. B's age is 6 years more than A. If the ratio of B's age 9 years hence ...

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  18. Ratio between age of priya and Swati is 3:4. If shikha is 6 year young...

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  19. Four year ago average age of P, Q and R is'33 years. At present, age ...

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  20. Ratio of age of A and B, 6 years ago was 3:4. Sum of the present age o...

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