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The same as Q1:Assume the printercartridgesin average can print 12,000 pages with 800 pages as its standard deviation (= 12000, = 800), and it is
The same as Q1:Assume the printercartridgesin average can print 12,000 pages with 800 pages as its standard deviation (= 12000, = 800), and it is a bell-shaped distribution for the number of pages (X) it can print before running of of ink.(X is a random variable, isn't it?)
Using Normal distribution table to answer (4 decimals)
What is the chance that your cartridge can print less than12,80011,945 pages?That means in Math: Prob(X < 11,945) or in short: P(X < 11,945) = ?
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