Solution not provided.
Ans. W = {XS1, XC1, XC2, XC3, YS2, YS3, YC4, YC3}
A lot consists of 12 good pencils, 6 with minor defects and 2 with major defects. A pencil is chosen at random. Find the probability that the pencil does not have:
(a) any defect (b) major defect