A man sold 18 toys for Rs. 18900, gaining thereby the cost price of 3 toy find the cost price of a toy  Choose one:  A) s. 600  B) s. 800  C) s.500  D) s.900  E) s. 990
Let the cost of one toy = X.   Then, cost of 18 toys = 18X.   Gain = 3X.   SP of 18 toys = Rs. 18900.   Gain = SP â€“ CP   3X = 18900 â€“ 18X   21X = 18900   X = Rs. 900.   ANSWER : OPTION s.900
<result>D</result>
A man sold 18 toys for Rs. 18900, gaining thereby the cost price of 3 toy find the cost price of a toy