In this task, you need to provide the correct option for a given problem from the provided options.

Problem: 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 ? 
Options: a ) 438 , b ) 436 , c ) 430 , d ) 442 , e ) 444
c

Problem: in a group of 28 junior high school students , 7 take french , 10 take spanish , and 2 take both languages . the students taking both french and spanish are not counted with the 7 taking french or the 10 taking spanish . how many students are not taking either french or spanish ? 
Options: a ) 7 , b ) 6 , c ) 9 , d ) 4 , e ) 8
c

Problem: 70 students are required to paint a picture . 52 use green color and some children use red , 38 students use both the colors . how many students use red color ? 
Options: a ) 53 , b ) 54 , c ) 55 , d ) 56 , e ) 57

d