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A Large Industrial Firm Allows a Discount on Any Invoice

question 85

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A large industrial firm allows a discount on any invoice that is paid within 30 days.Of all invoices, 10% receive the discount.In a company audit, 10 invoices are sampled at random.The probability that fewer than 3 of the 10 sampled invoices receive the discount is approximately_______________.


Definitions:

Mineral Deposit

A mass of naturally occurring rocks and other materials that are especially rich in some commodity that might be valuable.

Leaching

The separation or dissolution of soluble constituents from a rock, sediment, or soil by percolation of water.

RePrecipitate

The process in which dissolved substances crystallize or become solid again from a solution.

Angle of Repose

The steepest angle at which loose material, like sand or gravel, can be piled without slumping, determined by the frictional contact between the particles.

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