The mean of the set of four test scores is 88. If three of the test scores are 84, 88, and 94, what is the fourth test score?
A. 86
B. 88***
C. 90
D.92
please help am i right?
oh sorry i meant A
yep your correct skye ;)
ok thank you so much ms. sue and levi <3
which one is it? A or C?
No. Solve the equation below.
(84 + 88 + 94 + x) / 4 = 88
266 + x = 352
oh whoops sorry for some reason it didn't show you commented
is it C (sorry I'm really bad at this)
It's A
To find the fourth test score, we can first calculate the sum of the four test scores and subtract the sum of the given three test scores. Then, we divide the difference by the number of test scores remaining (which in this case is 1) to find the missing test score.
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