[計量] pp3
Part of a $10,000 inheritance was invested at 4 percent
and the remainder was invested at 6 percent. The total
simple annual interest earned on the $10,000 at the end
of one year was $520.
Column A Column B
The amount invested The amount invested
at 4 percent at 6 percent
答案是 B
有人知道怎嚜解嗎
謝謝
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