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10 Jan 2021, 23:29
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
78% (01:12) correct
22%
(01:11)
wrong
based on 79
sessions
History
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Time
Result
Not Attempted Yet
During a 5 year period, the profits of Company Z changed by what percent from the fourth year to the fifth year?
(1)The profits of Company Z during the fifth year were twice as great as profits during the third year.
(2) The increase in profits of Company Z was the same for each year during the 5-year period.
(1)The profits of Company Z during the fifth year were twice as great as profits during the third year.
(2) The increase in profits of Company Z was the same for each year during the 5-year period.
11 Jan 2021, 00:06
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stowaway
Similar questions to practice:
https://gmatclub.com/forum/during-a-7-y ... 91940.html
https://gmatclub.com/forum/during-a-thr ... 09378.html
sudeshpatodiya
11 Jan 2021, 00:56
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Quote:
We are asked the percent change from 4th to 5th year.
1)
No information about 4th year.
Insufficient
2) The increase was same for each year. But, how much was the increase. We don't know.
Insufficient
Combining 1 & 2:
Let the profit at the end of 3rd year = x.
Profit increase is same each year and let this be "y", so
Profit at the end of 4th year = x+y
Profit at the end of 5th year = x+2y
But, we know Profit during the fifth year were twice as great as profits during the third year, so
x+2y = 2x
2y=x
y=x/2
So, profit during the 4th year = x+y = \(\frac{3}{2}\)x and profit during the 5th year = x+2y = 2x
Change = 5th year - 4th year / 4th year
Sufficient
(C)
