Content: teorver_3986.doc (28.50 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
3986. The store received refrigerators of three firms in the amount of 35, 20 and 4, respectively. The probability that the refrigerator will not fail during the warranty period is: for the first company, 0.95; for the second - 0.8; for the third - 0.9. The purchased fridge was reliable. Find the probability that this refrigerator is manufactured by a second firm.
Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)
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