SAT官方每日一题附答案和解析[数学](2018年5月18日)
日期:2018-05-18 09:36
(单词翻译:单击)
每日一题
Mathematics
Hailey's laundry basket contains 7 shirts. These 7 shirts account for approximately 21% of Hailey's total number of shirts. How many shirts does Hailey have in total?
A.2
B.3
C.26
D.33
答案和解析
答案：D
解析：
Choice D is correct. Let T represent Hailey's total number of shirts. If 21% of Hailey's total number of shirts is 7, then the following equation can be written: 0.21·T=7
To solve for T, multiply both sides of the equation by 0.21. The value of T is 33.3. Because 21% represented an approximate portion of the total number of socks, the value found for T is not an exact amount. Therefore, the best answer for the Hailey's total number of shirts is 33.
The total number of shirts is 33.
