27. The correct answer is (E). The money earned by b workers at D dollars per week is
bD dollars. The number of workers remaining is (m 2 b), and because they earn 1
2 D
dollars per week, the money they earn is:
1
2 mD 2 1
2 D(m 2 b) 5 1
2 bD
Thus, the total amount earned is:
bD 1 1
2 bD 5 1
2 bD 1 1
2 mD 5 1
2 D(b 1 m)
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