If by selling an article for Rs.60, a person loses 1/7 of money, what would he have gained or lost % by selling it for Rs.77? Choose the correct answer:  A) 6%  B) 10%  C) 14%  D) 15%  E) 20%
Sol. CP - = EC7 = 70 1-7 6 77-70 % Profit = 100 = 10%   10%
<result>B</result>
If by selling an article for Rs.60, a person loses 1/7 of money, what would he have gained or lost % by selling it for Rs.77?