9 answers
(click or scroll down)
No. Solve the equation below.
(84 + 88 + 94 + x) / 4 = 88
266 + x = 352
A. 86
B. 88***
C. 90
D.92
please help am i right?
(84 + 88 + 94 + x) / 4 = 88
266 + x = 352
Given three test scores: 84, 88, and 94.
Mean of the four test scores: 88.
To find the fourth test score:
Sum of the four test scores = Mean × Number of test scores
Sum of the four test scores = 88 × 4 = 352
Sum of the given three test scores = 84 + 88 + 94 = 266
Missing test score = Sum of four test scores - Sum of given three test scores
Missing test score = 352 - 266 = 86
So the missing test score is 86.
Therefore, the correct answer is A. 86