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 choice from the following choices.
A) Rs. 600  B) Rs. 800  C) Rs.500  D) Rs.900  E) Rs. 990
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 : OPTION Rs. 800
<result>B</result>
A man sold 18 toys for Rs. 16800, gaining thereby the cost price of 3 toy find the cost price of a toy