没有找到前人讨论的,不知道是不是这个题太白痴咯,不过我就是想不通呜~~
Q37:
Of the mutual funds on a “select list,” 1/3 have 5-star ratings, and 2/5 of the remaining funds have 4-star ratings. If the remaining 300 funds on the list have 3-star ratings, how many funds are on the list?
A. 500
B. 750
C. 1,000
D. 1,200
E. 1,500
答案选B...可我是这样算的:1/3*3/5*x=300,不知道有没有理解错题意?
错了,这个题的意思是:
1/3是五星,剩下的2/5是四星(再就是剩下的3/5是三星)
所以三星=2/3*3/5=2/5有300,因此是750
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