The average expenditure of a man for the first five months is Rs.180 and for the next seven months it is Rs.130. If he saves Rs.290 in that year, his monthly average income is :  Options.
A) Rs.140
B) Rs.150
C) Rs.160
D) Rs.175
E) none
Explanation:   Total income = Rs.(180Ã—5+130Ã—7+290)=Rs.2100   Average monthly income   = Rs. (2100/12)=Rs.175   Correct Option: Rs.175
<result>D</result>
The average expenditure of a man for the first five months is Rs.180 and for the next seven months it is Rs.130. If he saves Rs.290 in that year, his monthly average income is :