[計量] 幾題問題請教

[AKgOd (Myth.EmPtY)]

1.Are there exactly 3 distinct symbols used to create the code words

  in language Q?

  (1) The set of all code words in language Q is the set of all possible

      distinct horizontal arrangements of one or more symbols, with no

      repetition.

  (2) There are exactly 15 code words in language Q.

  Ans: C              看不太懂題意..







2.If each of 4 subsidiaries of Corporation R has been granted a line of credit

  of $700000 and each of the other 3 subsidiaries of Crporation R has been

  granted a line of credit of $112000. What is the average line of credit

  granted to a subsidiary of Corporation R?

  (A) $1568000

  (B) $448000

  (C) $406000

  (D) $313600

  (E) $116000

  Ans: B     請問怎麼算的?

3.A family made a down payment of $75 and borrowed the balance on a set of

  encyclopedias that cost $400. The balance with interest was paid in 23

  monthly payments of $16 each and a final payment of $9. The amount of

  interest paid was what percent of the amount borrowed?

  (A) 6%

  (B) 12%

  (C) 14%

  (D) 16%

  (E) 20%

  Ans: D            麻煩解釋一下怎麼算的...

  Thanks




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◆ From: 122.123.32.201
※ 編輯: AKgOd           來自: 122.123.32.201       (05/27 20:52)
※ 編輯: AKgOd           來自: 122.123.32.201       (05/27 20:58)
推 cmchen40:第三題~題目正確嗎? @@
→ AKgOd:正確^_^ 已經有版友幫解了 感恩
推 cmchen40:2. ((23*16+9)-(400-75))/(400-75)=16%