The salaries at a corporation are normally distributed with an average salary of $19,000 and a standard deviation of $4,000.
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3. The salaries at a corporation are normally distributed with an average salary 

of $19,000 and a standard

deviation of $4,000. 

a. What is the probability that an employee will have a salary between 

$12,520 and $13,480? 

b. What is the probability that an employee will have a salary more than 

$11,880? 

c. What is the probability that an employee will have a salary less than 

$28,440? 

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