According to the direction on a can of frozen orange juice concentrate . 1 can of concentrate is to be mixed with 3 cans of water to make orange juice .How many 12-ounce cans of the contentrate are required to prepare 200 6-ounce serving of arange juice?
A 25
B 34
C 50
D 67
E 100
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 $2,000, what was the dealer’s total profits or loss in dollars for the two transactions combined?
The residents of Town X participated in a survey to determine the number of hours per week each resident spent watching television . The distribution of the results of the survey had a mean of 21 hours and a standard deviation of 6 hours .The number of hours that Pat ,a resident of Town X watched television last week was between 1 and 2 standard deviations below the mean . Which of the following could be the number of hours that Pat watched television last week ?
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发表于 2011-1-26 21:08:52
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<21-6; only 12 btw 7 and 15, so D.