at the faculty of aerospace engineering , 302 students study random - processing methods , 232 students study scramjet rocket engines and 112 students study them both . if every student in the faculty has to study one of the two subjects , how many students are there in the faculty of aerospace engineering ?
"302 + 232 - 112 ( since 112 is counted twice ) = 422 d is the answer"
add(subtract(302, divide(112, const_2)), subtract(232, divide(112, const_2)))