A man sold 18 toys for Rs. 16800, gaining thereby the cost price of 3 toy find the cost price of a toy  Choose the correct option: A) Rs. 600 B) Rs. 800 C) Rs.500 D) Rs.900 E) Rs.970
Let the cost of one toy = X.   Then, cost of 18 toys = 18X.   Gain = 3X.   SP of 18 toys = Rs. 16800.   Gain = SP – CP   3X = 16800 – 18X   21X = 16800   X = Rs. 800.   answer : Rs. 800
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A man sold 18 toys for Rs. 16800, gaining thereby the cost price of 3 toy find the cost price of a toy