# Noah has a bag of 30 marbles. Of these marbles 8 are blue, 9 are red, and the rest are clear. What is the probability that a marble taken from the bag will not be red?

$\frac{9}{10}$
$P \left(\text{red}\right) = \frac{9}{30} = \frac{3}{10}$
$\therefore P \left(\text{not red}\right) = 1 - \frac{3}{10} = \frac{9}{10}$