in an examination , 35 % of total students failed in hindi , 45 % failed in english and 20 % in both . the percentage of these who passed in both the subjects is :
"pass percentage = 100 - ( 35 + 45 - 20 ) = 100 - 60 = 40 answer : d"
subtract(const_100, subtract(add(35, 45), 20))