If a bag contains 4 red, 3 green, and 5 blue marbles, what is the probability of
Practice Questions
Q1
If a bag contains 4 red, 3 green, and 5 blue marbles, what is the probability of drawing a blue marble?
1/3
1/4
5/12
5/10
Questions & Step-by-Step Solutions
If a bag contains 4 red, 3 green, and 5 blue marbles, what is the probability of drawing a blue marble?
Correct Answer: 5/12
Step 1: Count the number of red marbles. There are 4 red marbles.
Step 2: Count the number of green marbles. There are 3 green marbles.
Step 3: Count the number of blue marbles. There are 5 blue marbles.
Step 4: Add the total number of marbles together. 4 red + 3 green + 5 blue = 12 total marbles.
Step 5: Identify how many of the total marbles are blue. There are 5 blue marbles.
Step 6: Calculate the probability of drawing a blue marble. Probability = (Number of blue marbles) / (Total number of marbles) = 5 / 12.
Probability Calculation – Understanding how to calculate the probability of an event by dividing the number of favorable outcomes by the total number of possible outcomes.
Total Count of Outcomes – Recognizing the importance of correctly counting the total number of items in a sample space.
