Question

a bag with 6 marbles has 2 red marbles, 1 blue marble, and 3 yellow marbles. a marble is chosen from the bag at random. what is the probability that it is not red? write your answer as a fraction in simplest form.

Explanation:

Step1: Calculate total number of marbles

Total marbles = $6$

Step2: Calculate number of non - red marbles

Non - red marbles = $1$ (blue) + $3$ (yellow) = $4$

Step3: Calculate probability

Probability = $\frac{\text{Number of non - red marbles}}{\text{Total number of marbles}}=\frac{4}{6}=\frac{2}{3}$

Answer:

$\frac{2}{3}$