The Expected (Mean)life of a Particular Type of Light Bulb

question 12

Multiple Choice

The expected (mean) life of a particular type of light bulb is 1,000 hours with a standard deviation of 50 hours.The life of this bulb is normally distributed.What is the probability that a randomly selected bulb would last less than 1,100 hours?

• A)0.4772
• B)0.9772
• C)0.0228
• D)0.5228
• E)0.5513

---

Definitions:

Shareholder-Managers

Individuals who both own shares in a company and actively manage its operations or participate in strategic decision-making.

Personal Credit Card Bills

Statements issued to credit card holders outlining transactions, payments due, and other account activity for a billing cycle.

Annual Report

A comprehensive report on a company's activities, financial performance, and strategy, provided yearly to shareholders and the public.

Corporation

A legal entity that is separate and distinct from its owners, offering limited liability to its shareholders, and having the ability to own property, sue, and be sued.