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29 January, 13:31

g A small survey of iPad owners found 15% have an iPad Classic and 85% have an iPad Pro. Further, it was found that 77% of the iPad Classic owners purchased an AppleCare extended warranty while 68% of the iPad Pro owners purchased an AppleCare extended warranty.

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  1. 29 January, 15:10
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    required probability is 0.8335

    Explanation:

    Lets say we have a sample size of 1000

    15% have ipad classic = 15% of 1000 = 150

    85% have ipad pro = 85% of 1000 = 850

    77% of ipad classic owners purchased apple care extended warranty = 77% of 150 = 115.5

    68% of ipad pro owners purchased apple care warranty = 0.68*850 = 578

    Probability = favorable/total

    Total = purchased apple care warranty = 115.5 + 578 = 693.5

    Favorable = ipad pro = 578

    Required probability is 578 / (693.5) = 0.8335
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