Question

marsha has a bag that contains 4 green marbles, 8 yellow marbles, and 20 red marbles. if she chooses one marble from the bag, what is the probability that the marble is not red?
a. 3/16
b. 3/8
c. 5/16
d. 3/4

Explanation:

Step1: Calculate total number of marbles

Total marbles \(=4 + 8+20=32\)

Step2: Calculate number of non - red marbles

Non - red marbles \(=4 + 8 = 12\)

Step3: Calculate probability

Probability \(=\frac{\text{Non - red marbles}}{\text{Total marbles}}=\frac{12}{32}=\frac{3}{8}\)

Answer:

A. \( \frac{3}{10} \)