Answer:
D. The number of phone calls made daily from an office
Step-by-step explanation:
A continuous random variable is defined as a variable where the data can have an infinite number of possibilities.
Let's check the given options:
1- Option A:
The number of employees in an office is fixed. It will not change from one day to another. Therefore, the variable does not have infinite possibilities
............> This option is incorrect
2- Option B:
The salaries of employees in an office are fixed. They will not change from one day to another. Therefore, the variable does not have infinite possibilities
............> This option is incorrect
3- Option C:
The number of printers in an office is fixed. It will not change from one day to another. Therefore, the variable does not have infinite possibilities
............> This option is incorrect
4- Option D:
The number of phone calls made daily from an office is not fixed. They could be any number and can change daily. Therefore, the variable has infinite possibilities
............> This option is correct
Hope this helps :)