Answer:
4200 tickets of
and 1800 tickets of
were sold
Step-by-step explanation:
Given:
Tickets are sold at price
and
.
Let Number of tickets sold at price
be
.
Let Number of tickets sold at price
be
.
Theater has maximum capacity of 6000 seat.
Hence,

Total revenue to be generated is 

Now Multiplying equation 1 by 40 we get,

Now Subtracting equation 2 by equation 3 we get,

Now substituting value of x in equation 1 we get,

Hence a total of 4200 tickets of
and 1800 tickets of
were sold