Question: The average of 5, 10, 15, and x is 12. What is the value of x?
Options:
10
15
20
25
Correct Answer: 20
Solution:
Average = (5 + 10 + 15 + x) / 4 = 12. Therefore, 5 + 10 + 15 + x = 48, x = 48 - 30 = 18.
The average of 5, 10, 15, and x is 12. What is the value of x?
Practice Questions
Q1
The average of 5, 10, 15, and x is 12. What is the value of x?
10
15
20
25
Questions & Step-by-Step Solutions
The average of 5, 10, 15, 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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