Answer:
P(a triangle or a square is chosen first) [tex]=\frac{7}{13}[/tex]
Step-by-step explanation:
Probability of an outcome is the ratio of number of favorable outcome to total number of outcomes.
Total number of outcomes= 5 + 2 + 2 + 4 = 13
P(a triangle or a square is chosen first) = P(a triangle chosen first) + P(a square chosen first)
[tex]\texttt{P(a triangle chosen first)}=\frac{\texttt{Number of triangles}}{\texttt{Total number of shapes}}=\frac{2}{13}[/tex]
[tex]\texttt{P(a square chosen first)}=\frac{\texttt{Number of squares}}{\texttt{Total number of shapes}}=\frac{5}{13}[/tex]
[tex]\texttt{P(a triangle or a square is chosen first) }=\frac{2}{13}+\frac{5}{13}=\frac{7}{13}[/tex]
P(a triangle or a square is chosen first) [tex]=\frac{7}{13}[/tex]
