[tex] \displaystyle \text{Given data}\\\text{No.of cups a package contains = 3}\\\text{A serving of trail mix} = \frac{1}{3}\\\\\text{then' serving of trail max in the package} \\= \frac{3}{\frac{1}{3}}\\ = 3 \times \frac{3}{1} \\ = \boxed{9}\\\\\text{Hence, serving for trial mix in the package = 9} [/tex]
