All the widgets manufactured by Company X are stored in two warehouses, A and B

题目

All the widgets manufactured by Company X are stored in two warehouses, A and B. Warehouse A contains three times as many widgets as does warehouse B. If of the widgets in warehouse A and of the widgets in warehouse B are defective, what fraction of all the widgets are NOT defective?

选项

解析

仓库A的货物量是仓库B的3倍 \( A = 3*B \) A与B的比例为\( A:B = 3:1 \) 由于题目中的分数包含15和20，我们将比例乘以20： \( A:B = 60:20 \) defective零件数量： A的defective零件：\( (1/15)*60 = 4 \) B的defective零件：\( (1/20)*20 = 1 \) 非defective零件的占比 = 1 - （defective零件的占比） = \( 1 - (5/80) \) = \( 1 - (1/16) \) = \( 15/16 \) 选项C

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