A jar contains 7 red balls, 3 blue balls and 8 green balls of same size. Sheena takes out a ball from the jar at random. What is the probability that the chose ball is non-blue?
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Verified answer
Answer:
To find the probability that the chosen ball is non-blue, you can calculate the ratio of the number of non-blue balls to the total number of balls.
The total number of balls is the sum of the red, blue, and green balls:
Total number of balls = 7 (red) + 3 (blue) + 8 (green) = 18 balls
Now, the probability (P) of choosing a non-blue ball is the number of non-blue balls divided by the total number of balls:
�
(
non-blue
)
=
Number of non-blue balls
Total number of balls
P(non-blue)=
Total number of balls
Number of non-blue balls
In this case, the number of non-blue balls is the sum of red and green balls:
Number of non-blue balls = 7 (red) + 8 (green) = 15 balls
�
(
non-blue
)
=
15
18
P(non-blue)=
18
15
Now, you can simplify the fraction:
�
(
non-blue
)
=
5
6
P(non-blue)=
6
5
So, the probability that the chosen ball is non-blue is
5
6
6
5
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Answer:
Probability of non-blue is 15/18