Question: The average of 5, 10, 15, 20, and x is 12. What is the value of x?
Options:
5
10
15
20
Correct Answer: 10
Solution:
Average = (5 + 10 + 15 + 20 + x) / 5 = 12. Therefore, 50 + x = 60, so x = 10.
The average of 5, 10, 15, 20, and x is 12. What is the value of x?
Practice Questions
Q1
The average of 5, 10, 15, 20, and x is 12. What is the value of x?
5
10
15
20
Questions & Step-by-Step Solutions
The average of 5, 10, 15, 20, and x is 12. What is the value of x?
Average Calculation – Understanding how to calculate the average of a set of numbers and how to manipulate the equation to solve for an unknown variable.
Algebraic Manipulation – Applying basic algebra to isolate the variable x in the equation derived from the average.
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