Mathematics
Medium
Question
A person ordered 5 pairs of black socks and some pairs of brown socks. The price of a black pair was thrice that of a brown pair while preparing the bill the bill clerk inter-changed the number of black and brown pairs by mistake which increased the bill by 100% what was the number of pair of brown socks in the original order?
A
10
B
15
C
20
D
25
✓ Official correct answer
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A
10
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B
15
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C
20
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D
25
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