Answer
Total = 200C3
= 1313400
a. No defective units = 197C3 / 1313400
= 1254890 / 1313400 = 0.955 (Not unusual)
b. all defective units = 3C3 / 1313400
= 1/1313400 = 7.6 x 10$^{-8}$ (Unusual)
c. at least 1 defective unit = 1 - 0.955
= 0.045 (Unusual)
d. at least 1 non-defective unit = 1 - 7.6 x 10$^{-8}$
= 0.9999992 (Not unusual)
Work Step by Step
As given in answer
