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

question 13

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,what is the probability that the battery will perform reliably during a one-hour exam?

• A)0.05
• B)0.10
• C)0.20
• D)0.90
• E)0.95

---

Definitions:

Days In Inventory

A financial ratio indicating the average number of days a company takes to turn its inventory into sales, reflecting inventory management efficiency.

Inventory

The goods and materials a business holds for the ultimate goal of resale or processing.

Days In Inventory

A financial metric that indicates the average number of days a company holds inventory before it is sold, calculated by dividing inventory by cost of goods sold and multiplying by 365.

Inventory

Materials and products that are held by a company for the purpose of sale or production.