Answer to Question #69155 in Statistics and Probability for Angel

Question

It is noted that 8% of kaplan students are left handed if 20 (TWENTY) students are randomly selected, calculate the
1) probability that none of them are left-handed
2) probability that at most 2 are left handed,
3) standard deviation for the number of left-handed student
4)if 50 classes of 20 students are randomly selected,what is the 10 classes have no left handed students?

Can i get the Question 4?

Thank you very much