A jar contains 8 red and 4 blue marbles. What is the probability of selecting a blue marble?
Practice Questions
1 question
Q1
A jar contains 8 red and 4 blue marbles. What is the probability of selecting a blue marble?
1/3
1/2
1/4
1/5
Total marbles = 8 + 4 = 12. Probability of blue marble = 4/12 = 1/3.
Questions & Step-by-step Solutions
1 item
Q
Q: A jar contains 8 red and 4 blue marbles. What is the probability of selecting a blue marble?
Solution: Total marbles = 8 + 4 = 12. Probability of blue marble = 4/12 = 1/3.
Steps: 6
Step 1: Count the number of red marbles. There are 8 red marbles.
Step 2: Count the number of blue marbles. There are 4 blue marbles.
Step 3: Add the number of red and blue marbles together to find the total number of marbles. Total marbles = 8 + 4 = 12.
Step 4: Identify how many of the total marbles are blue. There are 4 blue marbles.
Step 5: To find the probability of selecting a blue marble, divide the number of blue marbles by the total number of marbles. Probability of blue marble = 4 (blue marbles) / 12 (total marbles).
Step 6: Simplify the fraction 4/12. This simplifies to 1/3.
