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A. 33 1/3%
B. 50%
C. 25%
D. 66 2/3%
E. None of these

Explanation:

Let the CP of each pen be Rs. 1.

CP of 99 pens = Rs. 99
Profit = Cost of 33 pens = Rs. 33
Profit% = 33/99 * 100 = 33 1/3%

Correct Answer: 33 1/3%

Last Updated: February 07, 2020