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In a factory, two machines M1 and M2 manufacture 60% and 40% of the autocomponents respectively. Out of the total production, 2% of M1 and 3% of M2 are found to be defective. If a randomly drawn autocomponents from the combined lot is found defective, what is the probability that it was manufactured by M2?

  1. 0.35
  2. 0.45
  3. 0.5
  4. 0.4
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