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Last year the average (arithmetic mean) cost of 5 computer models was $2,000. What is the average cost of the same 5 computer models this year?
(1) For 3 of the 5 models, the cost this year is 12 percent lower than the cost last year.
(2) For 2 of the 5 models, the cost this year is 10 percent higher than the cost last year.
[spoiler]OA=E[/spoiler]
Source: Manhattan GMAT
(1) For 3 of the 5 models, the cost this year is 12 percent lower than the cost last year.
(2) For 2 of the 5 models, the cost this year is 10 percent higher than the cost last year.
[spoiler]OA=E[/spoiler]
Source: Manhattan GMAT
