A Computer Store Has 75 Printers of Which 25 Are

question 81

Multiple Choice

A computer store has 75 printers of which 25 are laser printers and 50 are ink jet printers. If a group of 10 printers is chosen at random from the store, find the mean and variance
Of the number of ink jet printers.

• A) Mean = 3.3, Variance = 2.2
• B) Mean = 6.7, Variance = 2.2
• C) Mean = 3.3, Variance = 1.5
• D) Mean = 6.7, Variance = 1.5

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Definitions:

Customers

Individuals or businesses who purchase goods or services from another entity.

Expected Value

The average outcome of a random variable, calculated as the sum of all possible values each multiplied by their respective probability of occurrence.

Raffle Tickets

Tickets sold as a means to raise money for a cause, with the chance of winning prizes.

Binomial Distribution

a probability distribution describing the number of successes in a fixed number of independent Bernoulli trials, with a constant probability of success.