Question

If the average (arithmetic mean) of $57,54$ and $x$ is $70$. What is the value of $x$?

• A. $102$
• B. $99$
• C. $87$
• D. $92$

Answer 1

Answer: (B)

$99$

Average Arithmetic mean of $57$ ,$54$ & $x$$=$ $70$

Mean $=$$\frac{57+54+x}{3}$

$=>70=\frac{57+54+x}{3}$

$=>210=111+x$

$=>x=99$