The average earning of amechanic for the first 4days of a week is Rs.32 and for the last four days is Rs.22. If heearns Rs.20 on the fourth day, his average earning forthe whole week is?	Choose the correct choice from the following choices:
A) s. 10 B) s. 20 C) s. 32 D) s. 40 E) s. 28
Total earning for the week = Sum of earning of first four days + Sum of earning of last four days - Earning of 4th day   = 4 x 32 + 4 x 22 -20   = Rs. 196   âˆ´ Average earning = 196/ 7   = Rs. 28   s. 28
<result>E</result>
The average earning of amechanic for the first 4days of a week is Rs.32 and for the last four days is Rs.22. If heearns Rs.20 on the fourth day, his average earning forthe whole week is?