Use the Basic Rules and Definitions of Probability

question 9

Multiple Choice

Use the basic rules and definitions of probability.
-During its grand opening week, Stickler's bicycle shop offers a "wheel of discount
Savings." After customers select the items they wish to purchase, they spin the wheel to
Determine the discount they will receive. The wheel is divided into 12 slices. Six slices
Are red and award a 10% discount, three slices are white and award a 20% discount, and
Two slices are blue and award a 40% discount. The remaining slice is gold and awards a
100% discount! The probability that a customer gets at least a 40% discount is

• A) 3 / 12
• B) 2 / 12
• C) .0625
• D) 9 / 12
• E) 10 / 12

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Definitions:

Z Score

A numerical calculation indicating how a specific value's distance from the group's average is expressed in multiple standard deviations.

Mean

The arithmetic average of a set of numbers, calculated by adding them all up and dividing by the quantity of numbers.

Standard Score

A score that expresses an individual's position relative to the mean, based on the standard deviation of the scores in the distribution.

Standard Deviations

A metric that calculates the degree of spread or variability of data points relative to their average value.