A certain company paid bonuses of $125 to each of its executive employees and $75 to each of its nonexecutive employees. If 100 of the employees were nonexecutives, how many were executives?

Let x be the no. of executives, so company paid x*125 & 100*75
(1) The company has a total of 120 employees --> 100 are non exec. so x=20....sufficient
(2) The total amount that the company paid in bonuses to its employees was $10.000 --> x*125 + 100*75 = 10000......sufficient

Ans. D)
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Here we are mistakenly assuming that company only consisting of Executive and Non Executive,what if company consists of other category employee that is not explicitly mentioned here. Statement 1 is not sufficient. Statement 2 is sufficient because we know the bonus
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