Question

Two machines each produce batches of part Q7BC. A random sample of Q7BC parts from each...

  1. Two machines each produce batches of part Q7BC. A random sample of Q7BC parts from each machine’s recent production produced the following frequency table. One Q7BC part is selected randomly.

Frequencies

Machine A

Machine B

Totals

Defective (D)

5

2

7

Not Defective (N)

  145

48

193

Totals

150

50

200

Express each desired probability using proper probability notation. Then find the probability using our probability framework. Show your work.

  1. Find the probability that the part was produced by machine A or is defective.

  1. Find the probability that the part was produced by machine A and is defective.

  1. Suppose the part was produced by machine A. Find the probability the part is defective.
Math   Statistics-And-Probability   
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