A quadratic equation a x^{2}-2 a x+b=0 has two real solutions. What is the average of the solutions?

**Answer Choices**

A. 1

B. 2

C. \dfrac{b}{a}

D. \dfrac{2 b}{a}

E. \sqrt{2 a-b}

A quadratic equation a x^{2}-2 a x+b=0 has two real solutions. What is the average of the solutions?

**Answer Choices**

A. 1

B. 2

C. \dfrac{b}{a}

D. \dfrac{2 b}{a}

E. \sqrt{2 a-b}