Content: teorver_0420.doc (30.50 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
420. In a consignment of goods, 400 items. The probability that the products will be a premium grade is 0.8. What is the probability that the products of the highest grade will be from 310 to 330.
Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)
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