Circuit Boards for Wireless Telephones Are Etched, in an Acid

question 30

Multiple Choice

Circuit boards for wireless telephones are etched, in an acid bath, in batches of 100 boards.A sample of seven boards is randomly selected from each lot for inspection.A particular batch contains two defective boards; and x is the number of defective boards in the sample.P(x=0) is _______.

• A)0.1315
• B)0.8642
• C)0.0042
• D)0.6134
• E)0.8134

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Definitions:

Wilmot Proviso

A proposed, but never enacted, amendment in 1846 that aimed to prohibit slavery in any territory acquired from Mexico, intensifying the pre-Civil War debates over slavery.

Missouri Compromise

Deal proposed by Kentucky senator Henry Clay in 1820 to resolve the slave/free imbalance in Congress that would result from Missouri’s admission as a slave state; Maine’s admission as a free state offset Missouri, and slavery was prohibited in the remainder of the Louisiana Territory north of the southern border of Missouri.

Railway System

A network of tracks on which trains run, serving as a critical infrastructure for the transport of passengers and goods over land, significantly contributing to economic development and urbanization.

American Economy

The economic system of the United States, characterized by a mixed economy that includes private freedom combined with centralized economic planning and government regulation.