Problem: in an examination , 30 % of total students failed in hindi , 35 % failed in english and 35 % in both . the percentage of these who passed in both the subjects is :
Rationale: "pass percentage = 100 - ( 30 + 35 - 35 ) = 100 - 30 = 70 answer : d"
annotated_formula: subtract(const_100, subtract(add(30, 35), 35))