Tamiami shearing machine is manufacturing 10 percent defective pieces, that is abnormally high. Quality control engineer has been checking output by almost continuous sampling as abnormal condition began. Determine the probability that in sample of 10 pieces:
a. None are defective?
b. Exactly 1 will be defective?
c. 1 or more will be defective?
d. 5 or less will be defective?