Results of a survey of fifty students indicate that 30 like red jelly beans, 29 like green jelly beans, and 17 like both red and green jelly beans. How many of the students surveyed like no green jelly beans?
A. 17
B. 38
C. 21
D. 30

Step 1 ：Let the total number of students be represented as \(total\_students = 50\)

Step 2 ：Let the number of students who like green jelly beans be represented as \(green\_likers = 29\)

Step 3 ：To find the number of students who do not like green jelly beans, subtract the number of students who like green jelly beans from the total number of students: \(no\_green\_likers = total\_students - green\_likers\)

Step 4 ：Substitute the given values into the equation: \(no\_green\_likers = 50 - 29\)

Step 5 ：Simplify the equation to find the final answer: \(no\_green\_likers = 21\)

Step 6 ：Final Answer: \(\boxed{21}\)