Among three numbers, the first is twice the second and thrice the third. If the average of the three numbers is 49.5, then the difference between the first and the third number is :
Correct Answer: Description for Correct answer:
Let third number be x then second number will be \( \Large \frac{3x}{2} \) and first number will be 3x.
Accordig to question,
3x + \( \Large \frac{3x}{2} \) + x = 49.5 x 3
\( \Large \frac{11x}{2} \) = 49.5 x 3 => x = 27
Required difference = 3x - x = 2x = 2 x 27 = 54
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