Question

a jar of an unknown amount of red, blue, and yellow marbles sits before you. marbles are put back into the jar before the next random pull. what is the probability of pulling a red marble?

Explanation:

Step1: Count red marbles

Count the number of red marbles in the jar.

Step2: Count total marbles

Count the total number of marbles (red + blue + yellow).

Step3: Calculate probability

Probability formula: \(P=\frac{\text{Number of red marbles}}{\text{Total number of marbles}}\times100\%\).

Assume there are 9 red marbles, 6 blue marbles, and 5 yellow marbles. Total marbles \(=9 + 6+5=20\). Then \(P=\frac{9}{20}\times100\% = 45\%\).

Answer:

45%