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Expert replies
by janvierek » Fri Jun 22, 2007 11:37 am
1.
ann:$450,000
Bob:$360,000
Cal: $190,000
Dot:$210,000
Ed:$680,000

The table above shows the total sales recorded in july for the 5 sales person. it was discovered that one of Cal's sales was incorrectly recorded as one of Ann's sales. After this error was corrected, Ann's total sales were still higher than Cal's total sales, and the median of the 5 sales total was $330,000. What was the value of the incorrectly recorded sale?
a)$30,000
b)$48,000
c)$90,000
d)$120,000
e)$140,000

2. A certain car averages 25 miles per gallon of gasoline when driven in the city and 40 miles per gallon when driven on the highway. According tp the these rates, which of the following is closest to the number of miles per gallon that the car averages when it is driven 10 miles in the city and then 50 miles on the highway?
a)28
b)30
c)33
d)36
e)38
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Source: — Problem Solving |

by maolivie » Fri Jun 22, 2007 11:54 am
1- C
Originally the salaries were arranged as
Cal, Dot, Bob, Ann, Ed.
Bob had the median salary of 360,000. If the median changed to 330,000, that means that Anne has the new median because for cal to have the new median then Cals salary would increase 140k. If his salary increase 140k it would be greater then annes because hers will decrease by 140k. Therefore, Anne's must of decreased by 90k to become 330,000. and Cals would increase by 90 k to become 280,000. Thus, less than Anne still.

2 - D
Create a table with R, T, and D. total distance is 60 miles. Find the individual times and add them. Total time becomes 1.65 hours. Solve for r ( R=60/1.65) = 36.363636363636363636363633663363636363636363636363636363 and so on.

Is this right?
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by drhomler » Fri Jun 22, 2007 5:08 pm
For 2 I would use the same concept to go 10 miles at 25 mpg would be .4 gallons used and to go 50 miles at 40mpg would use 1.25 gallons therefore 1.65 gallons total to 60 miles . 60/1.65 mpg
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by harry_x1 » Sat Jun 23, 2007 1:05 am
the answer of first question should be $ 120000 and not $90000...
kindly confirm
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by moneyman » Sat Jun 23, 2007 6:58 am
Question (1)-Try plugging in the values and solve the problem.E is eliminated at once and when D is plugged in the median becomes 330,000 and also satisfies the question..Therefore the answer is D.

Question (2)-The answer is D..The method used by drholmer is the best and the easiest.
Maxx
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