Answer: The answer is 80%.
Step-by-step explanation: Let us define the following events.
B = the event that the shirt is blue,
G = the event that the shirt is green
and
S = the event that the shirt is striped.
So, n(B) = 8, n(G) = 7, n(B and S) = 5, n(G and S) = 4.
n(S) = 5 + 4 = 9.
We have
[tex]n(B\cup S)=n(B)+n(S)-n(B\cap S)=8+9-5=12.[/tex]
Therefore, the required probability is
[tex]p=\dfrac{n(B\cup S)}{8+7}=\dfrac{12}{15}=\dfrac{4}{5}=0.8=80\%.[/tex]
Thus, the answer is 80%.
Answer:
The answer is 80%.
Step-by-step explanation:
B = the event that the shirt is blue,
G = the event that the shirt is green
and
S = the event that the shirt is striped.
So, n(B) = 8, n(G) = 7, n(B and S) = 5, n(G and S) = 4.
n(S) = 5 + 4 = 9.
We have
Therefore, the required probability is
Thus, the answer is 80%.
