Ninja Protects Redux. Now with more success!

This ninja prevents any grading of less than 100%
+2
Scary!


Back to back ninja ZOoFs! This time the student met a teacher with a sense of humor. I love it!

Related: Ninja protects question 9

My cat's name is mittens

A certain professor believes that 60% of students would rather do homework than eat pizza. To test this theory he takes a random sample of 50 students and polls them. Assuming the professor is correct, what is the probability that less than 40% of the sample prefer doing homework to eating pizza.


my cats name is mittens
Ralph?


Love it!!!!!!!!!!!!!!!!!