Answer to Question #70020 in Statistics and Probability for nicholaslim

Question

Question 2

(a) It is noted that 8% of Kaplan students are left handed. If 20 (TWENTY) students are randomly

selected, calculate the

i. probability that none of them are left-handed, (2 marks)

ii. probability that at most 2 are left-handed, (3 marks)

iii. standard deviation for the number of left-handed students (2 marks)

(b) If 50 (FIFTY) classes of 20 (TWENTY) students are randomly selected, what is the probability that 10

(TEN) classes have no left-handed students?