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The average of three numbers is 42. The first is twice the second and the second is twice the third. What is the difference between the largest and the smallest number?
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- 50
- 46
- 48
- 54
- 50
Correct Option: D
Let the third number be y .
Second number = 2y
First number = 4y
| Average = | = | ||
| 3 | 3 |
| Given : | 7y | = 42 or y = 18 |
| 3 |
The smallest number is y= 18
The largest number = 4y = 72
Difference = 72 – 18 = 54.
