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Suppose a machine produces metal parts t...

Suppose a machine produces metal parts that contain some defective parts probability 0.05. How many parts should be produced in order that the probability of at least one part being defective is 1/2 or more? ( Given `log_(10)95=1.977` and `log_(10)2=0.3`)

A

11

B

12

C

15

D

14

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