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题库解析   >   整数的性质题型   >   DS231-260
    本题由chris提供
506次学习
DS231-260

【OG18-P271-232题】


A citrus fruit grower receives $15 for each crate of oranges shipped and $18 for each crate of grapefruit shipped. Howmany crates of oranges did the grower ship last week?

(1) Last week the number of crates of oranges that the grower shipped was 20 more than twice the number of crates of grapefruit shipped.

(2) Last week the grower received a total of $38,700 from the crates of oranges and grapefruit shipped.


    <p>A.&nbsp;Statement&nbsp;(1)&nbsp;ALONE&nbsp;is&nbsp;sufficient,&nbsp;but&nbsp;statement&nbsp;(2)&nbsp;alone&nbsp;is&nbsp;not&nbsp;sufficient.</p><p>B.&nbsp;Statement&nbsp;(2)&nbsp;ALONE&nbsp;is&nbsp;sufficient,&nbsp;but&nbsp;statement&nbsp;(1)&nbsp;alone&nbsp;is&nbsp;not&nbsp;sufficient.</p><p>C.&nbsp;BOTH&nbsp;statements&nbsp;TOGETHER&nbsp;are&nbsp;sufficient,&nbsp;but&nbsp;NEITHER&nbsp;statement&nbsp;ALONE&nbsp;is&nbsp;sufficient.</p><p>D.&nbsp;EACH&nbsp;statement&nbsp;ALONE&nbsp;is&nbsp;sufficient.</p><p>E.&nbsp;Statements&nbsp;(1)&nbsp;and&nbsp;(2)&nbsp;TOGETHER&nbsp;are&nbsp;NOT&nbsp;sufficient</p><p><br/></p>
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答案:
C

设G数量

X

1 O数量为: 2X+20

2 15(2x+20)+18x=38700

1+2联立可以得出各自的数量,但是单独不成立,选C

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