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[計量] pp3 test2一題計量求解

看板GRE (GRE入學考試)作者 (小馬)時間14年前 (2011/06/20 01:44), 編輯推噓4(4推 0噓 1→)
留言5則, 5人參與, 最新討論串1/1
A certain money market account that had a balance of $48,000 during all of last month earned $360 in inetrest for the month. At what simple annuel interest rate did the account earn interest last month? A. 7% B. 7.5% C. 8% D. 8.5% E. 9% 看不太懂題目，我直接拿360/48000得7.5%但錯了 答案是E 想請問板上各位高手這題的語意還有解法，感謝各位了！ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 203.155.37.2
推
06/20 01:48, , 1F
7.5%是單月的 問年利率所以要*12=9%
06/20 01:48, 1F
推
06/20 01:49, , 2F
48000 * x% / 12 = 360, x = 9
06/20 01:49, 2F
推
06/20 01:52, , 3F
單月是0.75%?
06/20 01:52, 3F
推
06/20 01:58, , 4F
360*12=4320/48000=9%
06/20 01:58, 4F
→
06/20 02:16, , 5F
感謝解答!!!了解了!!!!
06/20 02:16, 5F
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