A jar contains 3 red balls and 2 green balls. You draw one ball at random. Determine the probability of selecting
a. red b. green c. blue d. red or green
red- 60%
green- 40%
blue- 10%
red or green- 80%
To determine the probability of selecting a specific ball, we need to divide the number of ways to draw that ball by the total number of possible outcomes.
a. Probability of selecting a red ball:
There are 3 red balls in the jar, and a total of 5 balls (3 red + 2 green). So, the probability of selecting a red ball would be:
Number of ways to draw a red ball = 3
Total number of possible outcomes = 5
Probability of selecting a red ball = 3/5
b. Probability of selecting a green ball:
There are 2 green balls in the jar, and a total of 5 balls (3 red + 2 green). So, the probability of selecting a green ball would be:
Number of ways to draw a green ball = 2
Total number of possible outcomes = 5
Probability of selecting a green ball = 2/5
c. Probability of selecting a blue ball:
There are no blue balls mentioned in the jar, so the probability of selecting a blue ball would be 0.
d. Probability of selecting either a red or a green ball:
To calculate the probability of selecting either a red or a green ball, we can add the probabilities of selecting a red ball and a green ball:
Probability of selecting a red or a green ball = Probability of selecting a red ball + Probability of selecting a green ball
Probability of selecting a red or a green ball = 3/5 + 2/5
Probability of selecting a red or a green ball = 5/5
Probability of selecting a red or a green ball = 1 or 100%
To determine the probability of selecting a particular ball from a jar, you need to divide the number of desired outcomes by the total number of possible outcomes.
a. Probability of selecting a red ball:
In this case, there are 3 red balls in the jar, so the number of desired outcomes is 3. The total number of balls in the jar is 3 (red) + 2 (green) = 5. Therefore, the probability of selecting a red ball is 3/5.
b. Probability of selecting a green ball:
Similarly, there are 2 green balls in the jar, so the number of desired outcomes is 2. The total number of balls in the jar remains 5. Hence, the probability of selecting a green ball is 2/5.
c. Probability of selecting a blue ball:
Based on the information provided, there are no blue balls in the jar. Since there are no desired outcomes for blue balls, the probability of selecting a blue ball is 0.
d. Probability of selecting a red or green ball:
To find the probability of selecting a red or green ball, you need to consider the number of desired outcomes, which is the sum of the red and green balls. In this case, there are 3 red balls and 2 green balls, totaling 3 + 2 = 5 desired outcomes. The total number of balls remains 5. Therefore, the probability of selecting a red or green ball is 5/5 or 1.
To summarize:
a. Probability of selecting a red ball: 3/5
b. Probability of selecting a green ball: 2/5
c. Probability of selecting a blue ball: 0
d. Probability of selecting a red or green ball: 1
Even if you are just starting to learn about probability you should be able to do this question.
What did you get for each one ?