vaibhav101 wrote:By selling oranges at $p for 1.66 dozen , a vendor makes a profit of r%. If he had bought them at the rate of q for $12, what does 5pq-12r equal ?
A 12
B 120
C 240
D 1200
E 2400
Let r=0, implying that no profit is made and that the oranges are sold at cost.
Let q=12, implying that the cost for 12 oranges is $12, with the result that the cost per orange = $1.
1.66 dozen = (5/3)(12) = 20 oranges.
Since the cost for 20 oranges = $20, p=20.
Thus:
5pq - 12r = (5*20*12) - (12*0) = 1200.
The correct answer is
D.
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