Solve the Problem. -An Electronics Company Kept Comparative Statistics on Two Products, a Two

question 53

Multiple Choice

Solve the problem.
-An electronics company kept comparative statistics on two products, A and B. For the years 2003 to 2011, the total number of Product A ever sold (in thousands) is given by the equation y = 77x + 200, where x is the
Number of years since 2003. For that same period, the total number of Product B ever sold (in thousands) is
Given by the equation y = -30x + 434, where x is the number of years since 2003. Use the substitution method to
Solve the system and choose the statement that most accurately describes the solution.

• A) At about 2.2 years (to the nearest tenth) since 2003, the company sold the same number of Product A as Product B.
• B) At some point between 2003 and 2011, the company had sold 2200 of each product.
• C) When 369,000 of Product A had been sold, 2.2 times as many of Product B had been sold.
• D) The company sold about 2.2 times as many of Product B as Product A.

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Definitions:

Probability Distribution

A mathematical function that provides the probabilities of occurrence of different possible outcomes in an experiment.

Sample Proportion

The fraction of the sample that shares a particular trait or characteristic.

Sampling Distribution

The probability distribution of a given random-sample-based statistic, used to make inferences about a population.

Simple Random Samples

A subset of individuals chosen from a larger set, where each individual is chosen randomly and entirely by chance.