?

GRE®

Free Version

Upgrade subject to access all content

Moderate

Missing Test Score

GRE-L1CGMK

Jon received the following test scores in his college algebra class:

$$78, 83, 85, X, 90$$

If he knows his test average is 84, what is the value of $X$?

A

$84$

B

$83$

C

$85$

D

$82$

E

$86$