In this question, we are looking for the no. of people.
Statements 1 and 2 alone are not sufficient because by itself, each statement has 3 variables for you to solve. 1st variable, the admission fee, 2nd variable the no of people attended and 3rd the total amount. Neither statement alone
allows you to solve.
Thus, the answer is C.
If this question is a PS question, the working as follows:
Let x be the admission fee per person
Let y be the no of person
Let z be the total admission fees
(x - 0.75) * (y + 100) = z
(x + 1.50) * (y - 100) = z
Thus, statement 1 = statment 2
(x - 0.75) * (y + 100) = (x + 1.50) * (y - 100)
=> xy + 100x - 0.75y -75 = xy - 100x + 1.50y - 150
=> - 0.75y - 75 = 1.50y - 150
=> 2.25y = 75
=> y = 75/2.25
Jimmy Low, Frankfurt, Germany
GMAT Malaysia: http://gmatmalaysia.blogspot.com