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11 November, 16:49

Two methods, a and b, are available for teaching a certain industrial skill. the failure rate is 20 percent for method a and 10 percent for method

b. method b is more expensive, however, and hence is used only 30 percent of the time. (method a is used the other 70 percent of the time). a worker is taught the skill by one of the two methods, but he fails to learn it correctly. what is the probability that he was taught by method a?

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  1. 11 November, 20:16
    0
    70% x 20%

    = 14%

    or 7/50
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