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Three numbers first are twice the second and second is twice the third. The average of the three numbers is 21. Find the largest number of the three.
  • a)
    36
  • b)
    38
  • c)
    47
  • d)
    48
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Three numbers first are twice the second and second is twice the thir...
Let,
IIIrd number = x
IInd number = 2x
Ist number = 4x
The average of the three numbers is 21.
(x + 2x + 4x)/3 = 21.
7x = 63.
x = 9
Largest number = 4x.
= 4 × 9 = 36.
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Three numbers first are twice the second and second is twice the third. The average of the three numbers is 21. Find the largest number of the three.a)36b)38c)47d)48Correct answer is option 'A'. Can you explain this answer?
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