Given -
Total wood sample = 100
Total graphite sample = 100
Defective wood sample = 15
Defective graphite sample = 20
To Find -
The probability that the racket is wood or defective =?
Step-by-Step Explanation -
Total wood and graphite sample = 100 + 100 = 200
Total defective wood and graphite sample = 15 + 20 = 35
Total non-defective wood and graphite sample = 200 - 35 = 165
Now,
The probability that the racket is wood or defective = Probability of wood + Probability of defective.
![\begin{gathered} =\text{ P\lparen wood\rparen + P\lparen defective\rparen} \\ \\ =\text{ }(100)/(200)\text{ + }(35)/(200) \\ \\ =\text{ }(135)/(200)\text{ = 0.675} \end{gathered}]()
Final Answer -
A. not listed