Q: A vegetable seller bought 10 dozens of potatoes for ` 120, another 5 dozens for ` 50 and another 5 dozens for ` 30. He sold the potatoes for ` 9 a dozen. How much discount did he overall offer?
A.
11.11%
B.
5%
C.
7.5%
D.
10%
Correct Answer:
Option D -
Explanations:
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