Re: [計量] 請教一題數學
※ 引述《siofish (小魚兒)》之銘言：
population data for ten seleced states in 1980 and 1987
state Population(in thousands) percent change in population per
1980 1987 population 1980~1987 square mile 1987
A 23668(1--->1)27663 16.9 177
B 17558(2--->2)17825 1.5 372
C 14229(3--->3)16789 18.0 64
D 9746(7--->4)12023 23.4 222
E 11864(4--->5)11936 0.6 266
F 11427(5--->6)11582 1.4 208
G 10798(6--->7)10784 -0.1 263
H 9262(8--->8) 9200 -0.7 162
I 7365(9--->9) 7672 4.2 1027
J 5882(10--->10) 6413 9.0 131
四個
If ranked from hightest to lowest according to population,
how many of the ten states changed in rank from 1980 to 1987?
(A) One
(B) Two
(C) Three
(D) four
(E) Five
ans:(D)
看不太懂這題的意思 @@"
請高手指點
感謝
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