The charge of admission fee for each person is $ 30.
The Cost of P people is C.
The equation relating C to P can be determined by using unitary method.
The cost of 1 person is 30
The cost of P person will be,
[tex]\begin{gathered} C=30\times P \\ C=30P \end{gathered}[/tex]
Thus, C=30P is the required equation.
The cost of admission for 19 people can be determined by substituting the value of P=19 in the above equation,
[tex]\begin{gathered} C=30\times19 \\ =570 \end{gathered}[/tex]
Thus, the required cost of admission is $ 570.
