A man spends 50% of his income on food, 15% on children education and 50% of the remaining on house rent. What percent of his income he is left with?
Choose the most appropriate option.
A) 17.5 % B) 16 % C) 15.4 % D) 12.6 % E) 13.5 %

Rationale: "let the total income be x then , income left = ( 100 - 50 ) % of x - [ 100 - ( 50 + 15 ) ] % of x = 50 % of 35 % of x = 17.5 % of x answer is a"
Answer: A