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A. 25%
B. 33 1/3 %
C. 50%
D. 66 2/3 %

Explanation:

Let C.P. of each pen be Re. 1.

Then, C.P. of 8 pens = Rs. 8; S.P. of 8 pens = Rs. 12.
Gain % = 4/8 * 100 = 50%

Correct Answer: 50%

Last Updated: February 07, 2020