Circuit Boards for Wireless Telephones Are Etched, in an Acid

question 13

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=2) is _______.

• A)0.1315
• B)0.8642
• C)0.0042
• D)0.6134
• E)0.0034

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Definitions:

Investment

Channeling funds into ventures with the expectancy of generating income or profit.

Interest

Interest is the cost of using someone else's money or the income earned from lending money, calculated as a percentage of the principal amount.

Grows

an increase in size, number, value, or strength.

Investment

Allocating financial resources with the aim of generating revenue or gains.