**Question:**

## There are 20 red marbles and 30 blue marbles in a bag. What is the probability of drawing a red marble?

**Options:**

A) 1/5

B) 1/3

C) 1/2

D) 2/5

**Answer:**

**B) 1/3**

**Solution:**

Probability = Favorable outcomes / Total outcomes. Favorable outcomes = 20 red marbles. Total outcomes = 20 red marbles + 30 blue marbles = 50 marbles. Probability = 20 / 50 = 1/3.