Monday, December 29, 2014

puzzle - quiz - average


its the puzzle time of quiz times of Newyork times of america:
            Company C sells a line of 25 products with an average retail price of $1200.
if none of these products sells for less than $420 and exactly 10 of the products
sell for less than $1000, what is the greatest possible selling price of the most expensive product?
a) $2600
b) $3900
c) $7800
d) $11800
e) $18200

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