At a Highway Checkpoint,the Average Speed of a Passing Car

question 263

Multiple Choice

At a highway checkpoint,the average speed of a passing car was measured at 50 miles per hour with a standard deviation of 5 miles per hour.According to Chebyshev's Theorem,what percentage of cars would you expect to be traveling between 42.5 and 57.5 miles per hour?

• A)at least 50%
• B)at least 55.6%
• C)at least 75%
• D)at least 88.9%

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