A man spends 2/5 of his salary on house rent, 3/10 of his salary on food and 1/8 of his salary on Conveyance. If he has $1400 left with him,find his expenditure on food and Conveyance.  Answers.
A) $ 8600 B) $ 2400 C) $ 1000 D) $ 3000 E) $ 3400

Rationale: remaining part of salary left = 1 - ( 2 / 5 + 3 / 10 + 1 / 8 ) = 1 - ( 33 / 40 ) = 7 / 40 let the monthly salary be $ x then , 7 / 40 of x = $ 1400 x = ( 1400 * 40 / 7 ) = $ 8600 expenditure on food = $ ( 3 / 10 * 800 ) = $ 2400 expenditure on conveyance = $ ( 1 / 8 * 8000 ) = $ 1000 $ 2400 + $ 1000 = $ 3400 so the answer is option e ) $ 3400
Answer: E