A building contractor employs 20 male, 15 female and 5 child workers. To a male worker he pays Rs.25 per day, to a female worker Rs.20 per day and a child worker Rs.8 per day. The average wage per day paid by the contractor is? Choose the correct choice from the following choices.
A) 11  B) 21  C) 88  D) 77  E) 61
20 15 5   25 20 8   500 + 300 + 40= 
<gadget id="calculator">500 + 300 + 40</gadget>
<output>840</output>
840/40= 
<gadget id="calculator">840/40</gadget>
<output>21</output>
21   Answer: 21
<result>B</result>
A building contractor employs 20 male, 15 female and 5 child workers. To a male worker he pays Rs.25 per day, to a female worker Rs.20 per day and a child worker Rs.8 per day. The average wage per day paid by the contractor is?