blueviper wrote:
How old will jack be when he retires 20 years from now, if the average of his current age and the retirement age is 50?
A. 40
B. 50
C. 60
D. 55
E. 65
If Jack is x years old now, when he retires 20 years from now, his age will be x+20
We are given that the average of his current age and retirement age is 50
(i.e.) \(\frac{x + x + 20}{2} = 50\) -> \(2x + 20 = 100\) -> \(x = \frac{80}{2} = 40\)
Therefore, Jack's age during retirement is x + 20 or
60(Option C)blueviper - The answer options in GMAT PS questions are always arranged in ascending order!
Please keep that in mind whenever you post questions from now on
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