Problem: in the faculty of reverse - engineering , 500 second year students study numeric methods , 300 second year students study automatic control of airborne vehicles and 300 second year students study them both . how many students are there in the faculty if the second year students are approximately 50 % of the total ?
Rationale: "total number of students studying both are 500 + 300 - 300 = 500 ( subtracting the 300 since they were included in the both the other numbers already ) . so 50 % of total is 500 , so 100 % is 1000 answer is d"
annotated_formula: add(500, 300)