Question

a bag contains 9 green marbles, 5 yellow marbles and 6 red marbles. you choose one marble. what is the probability of selecting a green or red marble?

Explanation:

Step1: Calculate total number of marbles

Total marbles = \(9 + 5+6=20\)

Step2: Calculate number of green or red marbles

Green or red marbles = \(9 + 6 = 15\)

Step3: Calculate probability

Probability \(P=\frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}=\frac{15}{20}=\frac{3}{4}\)

Answer:

\(\frac{3}{4}\)