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討論串[計量] Strange JJ
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How many combinations of three numbers from 1 to 10 can be made such that x<y<z.where x,y,z belongs to 1 to 10. ex: (1,2,3) ; (2,4,10). Ans: 512. Prob
(還有296個字)
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這一題的sold price應該是問Roger賣錶的價錢 而不是他買進的價錢Ans:B. 設1990年:X人. 1995年:115/100人....(1). 2000年:130/100人....(2). col a =(2)-(1)/(1)=3/23=15/115 < 15/100這題我怎麼覺得是4
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9. Roger sold a watch at a profit of 10%. If he had bought it at. 10% less and sold it for $13 less he would have made a profit of 15%.. What is the c
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