The average expenditure of a labourer for 6 months was 90 and he fell into debt. In the next 4 months by reducing his monthly expenses to 60 he not only cleared off his debt but also saved 30. His monthly income i  Choose the correct choice from the following answers.
A) 70
B) 72
C) 75
D) 78
E) 81
Income of 6 months = (6 × 90) – debt   = 540 – debt   Income of the man for next 4 months   = 4 × 60 + debt + 30   = 270 + debt   ∴ Income of 10 months = 810   Average monthly income = 810 ÷ 10 = 81   Answer 81
<result>E</result>
The average expenditure of a labourer for 6 months was 90 and he fell into debt. In the next 4 months by reducing his monthly expenses to 60 he not only cleared off his debt but also saved 30. His monthly income i