The average earning of a mechanic for the first-four days of a week is Rs. 18 and for the last four days is Rs. 22. If he earns Rs . 34 on the fourth day, his average earning for the whole week is ?	Choose the correct choice from the following answers: A) Rs . 15.95 B) Rs 16 C) Rs. 18 D) Rs. 25.71 E) None of these
Answer   Total earning for the week = Sum of earning of first four days + Sum of earning of last four days - Earning of 4th day   = 4 x18 + 4 x 22 -34   = Rs. 126   âˆ´ Average earning = 126 / 7   = Rs. 18   Rs. 18orrect Option: Rs. 18
<result>C</result>
The average earning of a mechanic for the first-four days of a week is Rs. 18 and for the last four days is Rs. 22. If he earns Rs . 34 on the fourth day, his average earning for the whole week is ?