Use a Tree Diagram to Find the Indicated Probability

question 1

Multiple Choice

Use a tree diagram to find the indicated probability.
-In the town of Cheraw,a certain type of laptop computer is sold at just two stores.Store A has 38% of the sales, 4% of which are of defective items,and store B has 62% of the sales,2% of which are of defective items.A
Person receives one of these laptop computers as a gift.What is the probability it is defective?

• A)0.014
• B)0.028
• C)0.42
• D)0.03

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Definitions:

Angle of Repose

The steepest angle at which a sloping surface formed of a particular loose material is stable.

Slope Failure

The sudden or gradual collapse of a slope that is too steep for its material to resist the pull of gravity.

Calcium Carbonate

Calcium carbonate is a chemical compound, CaCO3, found in rocks as the minerals calcite and aragonite and is the main component of shells of marine organisms, snails, and eggs.

Clay Minerals

A group of hydrous aluminium phyllosilicates, sometimes with variable amounts of iron, magnesium, alkali metals, alkaline earths, and other cations, which are found in soils and sedimentary rocks.