A manufacturer buys 30% of a certain part from one supplier and 70% from a second supplier. If 2% of the parts from the first supplier are defective, and 3% of the parts from the second supplier are defective, what is the probability that a part is defective?
(a) 0.025
(b) 0.020
(c) 0.017
(d) 0.027
(e) 0.037
Introduction:
Let A be the event that a randomly selected part is from the first supplier; so, AC denotes the event that a randomly selected part is from the second supplier.
Given that, P (A) = 0.30 = 30%; P (AC) = 0.70 ...
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