Disk of ploycarbonate plastic form a supplier are anaylzed for scratcha nd shock resistance. the results from 100 disks are summarized below:

Question

Shock Resistance
high low
Scratch high 70 9
resistance low 16 5

Let A denote the even that a disk has high shock resistance, and let B denote the event that a disk has high scratch resistance. Determine the number of disks in: P(A), P(B), P(A'),P(A and B), P(A union B), P(A' union B).