# The average weekly earnings of the plumbers in a city is [Mu=$750] with a standard deviation

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The average weekly earnings of the plumbers in a city is **[Mu=$750]** with a **standard deviation** of **[s=$40]**. Assume that we select a **random sample** of **[n=64 plumbers]**, what is the probability that the **sample mean [x] will be greater than $740 or greater than $755**?

b. 0.1587

c. 0.3413

d. 0.4772

e. **None** of the above answers is correct.

- 6 years ago

**The average weekly earnings of the plumbers in a city is [Mu=$750] with a standard deviation**

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