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.
