作业帮一道GMATOG上的DS题目求解
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一道GMATOG上的DS题目求解
有些单词稍微简写下last year the average(arithmetic mean)salary of the 10 employees of company X was $42800.What is the average salary of the same 10 empl this year?
for 8 of 10 empls,this year's salary is 15 percent greater then last year
for 2 of 10 empls,this year's salary is the same as last year
解析是E,我怎么觉得答案是C啊.
有些单词稍微简写下last year the average(arithmetic mean)salary of the 10 employees of company X was $42800.What is the average salary of the same 10 empl this year?
for 8 of 10 empls,this year's salary is 15 percent greater then last year
for 2 of 10 empls,this year's salary is the same as last year
解析是E,我怎么觉得答案是C啊.
Given:total salary= $42,800*10.
Question:new total salary=?
As you already know that each statement alone is not sufficient.
When taken together.Consider two possible cases:
2 lowest salaries didn't change and 8 highest salaries increased by 15%;
2 highest salaries didn't change and 8 lowest salaries increased by 15%;
Ask yourself,would new total salary be the same for both cases?No,because increase in amount for the first case will be more than increase in amount for the second case.Hence even taken together statements are not sufficient.
Answer:E.
Hope it's clear.
Question:new total salary=?
As you already know that each statement alone is not sufficient.
When taken together.Consider two possible cases:
2 lowest salaries didn't change and 8 highest salaries increased by 15%;
2 highest salaries didn't change and 8 lowest salaries increased by 15%;
Ask yourself,would new total salary be the same for both cases?No,because increase in amount for the first case will be more than increase in amount for the second case.Hence even taken together statements are not sufficient.
Answer:E.
Hope it's clear.