Problem: the average expenditure of a labourer for 10 months was 85 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 is
Rationale: "income of 10 months = ( 10 × 85 ) – debt = 850 – debt income of the man for next 4 months = 4 × 60 + debt + 30 = 270 + debt ∴ income of 10 months = 1120 average monthly income = 1120 ÷ 10 = 112 answer c"
annotated_formula: divide(add(add(multiply(85, 10), multiply(60, 4)), 30), add(10, 4))