From this information we know that the price of 50 tickets is 37.50 dollars.
Now we need to find the price of one ticket only so:
50 = 37.50
1 = X
Where X is the price of one ticket. Let us now cross-multiply this equation. It will give us:
50X = 37.50
X = 37.50/50
X = 0.75
So 1 ticket will cost 0.75 dollars.
How about 40 tickets?
We simply multiply 40 by the price of the 1 ticket, so:
40 * 0.75 = 30
Therefore the price of 40 tickets is 30 dollars.