During a concert, three types of tickets, tier A , tier B , tier C were sold. The amounts collected from selling the three types of tickets were in the ratio 11:9:7 respectively. The amount collected from selling tier B was $450000. What was the total amount of money collected from the sales of the three types of tickets?
Let the total amount collected from selling the three types of tickets be x.
The ratio of the amounts collected from selling tier A, tier B, and tier C is 11:9:7, which means the amounts collected are 11x/27, 9x/27, 7x/27 respectively.
From the problem, we are given that the amount collected from selling tier B is $450000, so 9x/27 = $450000.
Multiplying both sides of the equation by 27/9, we get x = 27*$450000/9 = $<<27*450000/9=1350000>>1350000.
Therefore, the total amount of money collected from the sales of the three types of tickets is $1350000. Answer: \boxed{1350000}.