SOLUTION: a trader bought some oranges at 75 cents each. she finds that six of them are rotten, she sells the rest at one dollar each and makes a profit of thirty-one dollar fifty cents how

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Question 73026: a trader bought some oranges at 75 cents each. she finds that six of them are rotten, she sells the rest at one dollar each and makes a profit of thirty-one dollar fifty cents how many oranges did he buy. (work in cents)
Answer by stanbon(48538) About Me  (Show Source):
You can put this solution on YOUR website!
a trader bought some oranges at 75 cents each. she finds that six of them are rotten, she sells the rest at one dollar each and makes a profit of thirty-one dollar fifty cents how many oranges did he buy. (work in cents)
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Let "x" be the number of oranges she bought: Value is 75x cents
Discards 6 and sells rest for a dollar each : Value is 100(x-6)=100x-600 cents
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EQUATION:
Income - Cost = 3150cents
100x-600 - 75x = 3150
25x = 2550
x = 510 (number of oranges she bought)
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Cheers,
Stan H.