Re: [計量] PP1 PS149題
※ 引述《AKgOd (Myth.EmPtY)》之銘言：
: A certain library assesses fines for overdue books as follows. On the first day
: that a book is overdue, the total fine is $0.10. For each additional day that
: the book is overdue, the total fine is either increased by $0.30 or doubled,
: whichever results in lesser amoun. What is the total fine for a book on the
: fourth day it is overdue?
: (A)$0.60
: (B)$0.70
: (C)$0.80
: (D)$0.90
: (E)$1.00
: Ans:(B)
: 個人思路:第四天Fines: 0.1+0.3+0.3+0.3=1.0 or 0.1 x 2 x 2 x 2=0.8
: 取lesser amount 0.8. 但答案是0.7..
: 謝謝
"increased by $0.30 or doubled" 這兩者選其一
第一天 0.1
第二天 選擇 double = 0.2 (增加0.1 < 0.3)
第三天 選擇 doulbe = 0.4 (增加0.2 < 0.3)
第四天 選擇 0.3 = 0.7 (double = 0.4 > 0.3)
以上 供你參考
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