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we need to find the ratio between ties of suede and shaped like a butterfly and the total of ties
ties selected are 8 we can take it from the table
then find the total of ties from the sum of the all numbers
[tex]\begin{gathered} 10+11+8+13 \\ =42 \end{gathered}[/tex]now the ratio to find the probability is
[tex]\frac{8}{42}[/tex]simplify by 2
[tex]\frac{4}{21}\approx0.19[/tex]probability is 4/21 or 0.19