From the table presented in the question, we can conclude that the total number of orders is equal to:
[tex]\begin{gathered} N=(334+34)+(272+60)+(248+32)+(123+20) \\ N=368+332+280+143 \\ N=1123 \end{gathered}[/tex]
The number among them which are from restaurant A is equal to 368. It means that the number of orders which are NOT from A is equal to 755. From this, we can calculate the ratio of the number of orders which are not from A by the total number of orders:
[tex]r=\frac{755}{1123}\cong0.672[/tex]
From this, we can say that if an order is picked randomly from those in the table, the probability it is NOT from A is equal to 0.672.
