GCSE Maths Practice: theoretical-vs-experimental-probability

\( \begin{array}{l}\text{A bag contains 6 red, 4 blue, and 10 green marbles.} \\ \text{A marble is drawn 40 times, and a red marble is drawn 18 times.} \\ \text{What is the experimental probability of drawing a red marble?}\end{array} \)

Choose one option:

\( \frac{18}{40} \) \( \frac{3}{8} \) \( \frac{1}{2} \)