Martin has worked for the last 30 years. If his average (arithmetic mean) total annual earnings for the first 5 years is $15,000, what is his average total annual earnings for the last 5 years?
1) Martin's average total annual earnings for the first 25 years is $27,000.
2) Martin's average total annual earnings for the last 25 years is $34,000.
The OA is C.
Statement 2, we can find the total earnings for the last 25 years. From the information given in the question statement, we can find the total earnings for the first 5 years.
Therefore, adding these two info we will get the total earnings for the entire 30 years.
Statement 1, we can find the total earnings for the first 25 years.
If the total earnings for the first 25 years is subtracted from the total earnings for the entire 30 years, we will have the total earnings for the last 5 years and the average total annual earnings during the last 5 years.
Has anyone another strategic approach to solving this DS question? Regards!
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Martin has worked for the last 30 years. If his average
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This is all good.AAPL wrote:Martin has worked for the last 30 years. If his average (arithmetic mean) total annual earnings for the first 5 years is $15,000, what is his average total annual earnings for the last 5 years?
1) Martin's average total annual earnings for the first 25 years is $27,000.
2) Martin's average total annual earnings for the last 25 years is $34,000.
The OA is C.
Statement 2, we can find the total earnings for the last 25 years. From the information given in the question statement, we can find the total earnings for the first 5 years.
Therefore, adding these two info we will get the total earnings for the entire 30 years.
Statement 1, we can find the total earnings for the first 25 years.
If the total earnings for the first 25 years is subtracted from the total earnings for the entire 30 years, we will have the total earnings for the last 5 years and the average total annual earnings during the last 5 years.
Has anyone another strategic approach to solving this DS question? Regards!
-Jay
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