Content: teorver_4042.doc (28.00 KB)
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Loyalty discount! If the total amount of your purchases from the seller more than:

$3 the discount is 1%
$6 the discount is 2%
$9 the discount is 3%
$12 the discount is 4%
$15 the discount is 5%
$18 the discount is 6%
$20 the discount is 7%
$30 the discount is 10%
$0.32
4042. The shop receives the same type of products from three factories, with the 1st plant supplying 30% of the products, the 2nd plant - 30%, the 3rd plant - 40%. Among the products of the 1st plant, 70% are top-notch, among the products of the 2nd - 70%, of the 3rd - 80%. Bought one product. It turned out to be first-rate. Determine the probability that the purchased product is produced by the 1st plant.
Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)
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