P1-PS-115

[Huang Hsin-Yi]

115. 11608-!-item-!-187;#058&007787
A used-car dealer sold one car at a profit of 25 percent of the dealer's purchase price for that car and sold another car at a loss of 20 percent of the dealer's purchase price for that car. If the dealer sold each car for $20,000, what was the dealer's total profit or loss, in dollars, for the two transactions combined?

(A) $1,000 profit
(B) $2,000 profit
(C) $1,000 loss
(D) $2,000 loss
(E) $3,334 loss

Ans:C
真是怪哩,怎麼算都是 A

[chiungfen]

設買價為x,y

1.25X=20,000 , X=16,000.................................. 16,000*0.25=4000(+)

0.8Y=20,000 ,Y=25,000...................................... 25000*0.2=5000(-) , so combined is -1000
(因為loss of 20% so is 0.8)

or 另一種方法
pro=sold-cost=20,000-16,000=4,000(+)
loss=cost-sold=25.000-20,000=5,000(-)
(成本比賣價多所以做生意是虧嚕)

好高興能為妳解答，希望對妳有幫助，謝謝妳的加油打氣

[Huang Hsin-Yi]

阿,感謝,原來我讀錯意拉!!