The Average Time Before Breakdown of a Machine Is Normally

question 25

Multiple Choice

The average time before breakdown of a machine is normally distributed and has a mean of 18 weeks and a standard deviation of three weeks. If breakdown cost averages $2,000 and preventive maintenance costs $1,400, what is the optimal preventive maintenance interval?

• A)16.4 weeks
• B)14.6 weeks
• C)16.9 weeks
• D)19.6 weeks
• E)21.3 weeks

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Definitions:

Crowdfunding

The practice of funding a project or venture by raising small amounts of money from a large number of people, typically via the Internet.

Capital

The wealth, whether in money or assets, owned or employed in business by an individual, firm, corporation, etc.

Venture

An endeavor or project that involves risk but is pursued with the expectation of future gains.

Crowdfunding

The method of supporting a project or business by collecting minor contributions from a vast number of individuals, usually through the internet.