(Choose 1 answer)
(See picture)
A. 0.83
B. 0.72
C. 0.85
D. 0.955
Disks of polycarbonate plastic from a supplier are analyzed for scratch and shock resistance. The results from 200 disks are summarized as follows:
shock resistance
high
low
scratch
high
low
144
22
resistance
25
9
If a disk is selected at random, what is the probability that its scratch resistance is high or its shock resistance is high?
Q: 16
