The table shows the scores of a group of students in a test. If the average score is 3.5, find the value of x
- 1
-
2
- 3
- 4
- 5
The correct answer is: B
Explanation
1 + 8 + 15 + 24 + 12 + x18 + x
= 3.5120 + 10x = 126 + 7x
3x = 6
x = 2