In terms of x , what is the average (arithmetic mean ) of 4x2 , x+2 , 2x+3 , and x+1 ?

×
2x1

×
2x

✓
2x+1

×
2x+4

×
8x+4
In terms of x , what is the average (arithmetic mean ) of 4x2 , x+2 , 2x+3 , and x+1 ?
2x1
2x
2x+1
2x+4
8x+4
The arithmetic mean is defined as \dfrac{a_1+a_2+\dots+a_n}{n}, in which a_n could be algebraic expression.
Here the average (arithmetic mean ) of 4x−2 , x+2 , 2x+3 , and x+1 is
\dfrac{4x2+x+2+2x+3+x+1}{4}
= 2x+1
C is correct choice