A jar contains 8 red, 6 blue, and 4 green marbles. What is the probability of se
Practice Questions
Q1
A jar contains 8 red, 6 blue, and 4 green marbles. What is the probability of selecting a blue marble?
1/3
1/4
2/5
3/10
Questions & Step-by-Step Solutions
A jar contains 8 red, 6 blue, and 4 green marbles. What is the probability of selecting a blue marble?
Step 1: Count the number of red marbles. There are 8 red marbles.
Step 2: Count the number of blue marbles. There are 6 blue marbles.
Step 3: Count the number of green marbles. There are 4 green marbles.
Step 4: Add the total number of marbles together: 8 (red) + 6 (blue) + 4 (green) = 18 total marbles.
Step 5: Identify how many of the total marbles are blue. There are 6 blue marbles.
Step 6: Calculate the probability of selecting a blue marble by dividing the number of blue marbles by the total number of marbles: 6 (blue) / 18 (total) = 1/3.
Probability Calculation – Understanding how to calculate the probability of an event by dividing the number of favorable outcomes by the total number of outcomes.
Total Outcomes – Recognizing the importance of correctly calculating the total number of items in a sample space.
