Task: Question Answering
Input (English): Problem: in the faculty of reverse - engineering, 230 second year students study numeric methods, 423 second year students study automatic control of airborne vehicles and 134 second year students study them both. how many students are there in the faculty if the second year students are approximately 80 % of the total ?
Options: a. 515., b. 545., c. 618., d. 649., e. 666.
Output (English): d