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题库 / Prep2007E1-PS-9
Last year the rangeof the annual salaries of the 100 employees at Company X was $30,000. If the annual salary of each of the 100employees this year is 10 percent greater than it was last year, what is therange of the annual salaries of the 100 employees this year?
$27,000
$30,000
$33,000
$36,000
$63,000
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let the lowest salary be x.
Therefore, highest salary is x +30000.
Now salary of each employee is increased by 10%.
Therefore the salaries will remain arranged in the same order as before.
or Lowest salary = 1.1x and Highest = 1.1 * (x+30000)
or Range = highest - lowest = 1.1 * (x+30000) - 1.1x
= 33000