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Three units of A, B, C of a factory produce 25%, 25% and [#permalink]
15 May 2004, 22:27
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Three units of A, B, C of a factory produce 25%, 25% and 50"% of its production respectively. If the percentages of defective items produced by the three units A, B, C are respectively 1%, 2% and 3% and an item selected at random is found to be defective, find the probability that it is produced by the unit (i) A; (ii) B