问题
单项选择题
DISTRlBUTl0N OF SALES INCOME FOR STORE S LAST WEEK
According to the graph above, the sale of fruits and vegetables in Store S last week accounted for what percent of the total sales income for the week ?()
(1)Last week the total income from the sale of fruits and vegetables in Store S was $16,000.
(2)x=2y
A.条件(1)充分,但条件(2)不充分.
B.条件(2)充分,但条件(1)不充分.
C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分.
D.条件(1)充分,条件(2)也充分.
E.条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联合起来也不充分.
答案
参考答案:D
解析:
由图表可知,商店S上星期的销售总收入是100,000美元,根据(1)可得水果和蔬菜占总销售收入的百分数为[*], 所以(1)充分;由图表可知x+y=100-28-40-8=24,再根据(2)的x=2y可得x=16,即x%=16%,所以(2)也充分。