If X Is a Normal Random Variable with Standard Deviation

question 39

Multiple Choice

If X is a normal random variable with standard deviation 3.00, and if the probability that X is less than 7.64 is .648 (as shown below) , then what is the mean of X? (Note: the diagram is not necessarily to scale.)

• A)5.6
• B)6.0
• C)6.2
• D)6.5

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