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Machine A makes 60% of items (2% faulty), B makes 40% (5% faulty). P(faulty)?
A0.07
B0.035
C0.028
D0.032
Answer & Solution
Correct answer: D. 0.032
P(faulty) = 0.6 x 0.02 + 0.4 x 0.05 = 0.012 + 0.020 = 0.032.
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