GCSE Maths Practice: relative-frequency

\( \begin{array}{l}\text{A bag contains 5 red and 3 blue marbles.}\\\text{The bag is shaken 40 times, and a red marble is drawn 20 times.}\\\text{What is the relative frequency of drawing a red marble?}\end{array} \)

Choose one option:

\( \frac{20}{40} \) \( \frac{1}{2} \) \( \frac{5}{8} \)