at the faculty of aerospace engineering , 312 students study random - processing methods , 232 students study scramjet rocket engines and 114 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 ?
312 + 232 - 114 ( since 112 is counted twice ) = 430 c is the answer
add(subtract(312, divide(114, const_2)), subtract(232, divide(114, const_2)))