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Re: If the number of senior managers increased by 60 percent fro [#permalink]
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The number of SM in 1980 15 so \(\frac{3}{5} \times 15=9\)

So in 2007 the total number was 15+9=24

In 2000 the number of them was 22 so we have had an increase of 2 persons

A is the answer
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