请教各位大虾两道princeton review math题
DS: If the total cost of a housing project with unit is $175000, what was the cost per unit ofr the housing project?
1) If half as many units were built for the same total price, the cost per unit would be $250000
2) If six more units had been built for the same total price, the cost per unit would be $3750 less
the answer is D, why 1) is also available?
In a card game, jacket initially set at $100 doubles each time any player takes a card. If 4 people play and each player takes 2 cards, what is the final amount of the jackpot?
1) 1.28*10(3)
2) 1.28*10(4)
3) 2.56*10(4)
4) 2.56*10(5)
5) 4.096*10(5)
why 3)?[em19] |
