Answer
$\frac{1}{3}$
Work Step by Step
The sample space in Exercise $5$ is:
[Red and Red, Red and White, Red and White]
From this, we can see that there is a $1$ possible outcome in which $2$ red marbles are drawn out of $3$ possible combinations.
We can use the formula $P=\frac{n}{s}$ to calculate the probability.
$P=\frac{n}{s}$
$P=\frac{1}{3}$
