A P/OM Student Has Purchased a Four-Function Calculator for Use

question 43

Multiple Choice

A P/OM student has purchased a four-function calculator for use during exams.This calculator is perfectly reliable except for two parts: its microchip,which has a failure rate of one in every twenty hours of operation; and its battery,which has a failure rate of one in every ten hours of operation.Also,on average the battery will fail in five hours,with a standard deviation of 30 minutes.Assuming that a new battery has just been installed and the student brings one spare battery with him,what is the probability that the calculator will perform reliably during a one-hour exam?

• A)0.89775
• B)0.9405
• C)0.987525
• D)0.99
• E)0.9975

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Definitions:

Accounts Payable

Liabilities or debts owed by a company to suppliers or creditors for goods or services purchased on credit.

Purchases Journal

A specific type of accounting record where a business records all transactions related to the acquisition of goods intended for resale or for use in production.

Cash Receipts Journal

A specialized accounting journal used to record all cash inflows of a business, including sales and debt collections.

Headings

Titles or captions of sections of a document or article, designed to introduce new sections and help readers understand the structure and content.