if 3 tickets cost $2 then the price of one ticket is 2/3 dollars

if x is the number of tickets you can buy for $10 we have

x*(2/3) = 10 multiply both sides by 3

2x = 30 divide both sides by 2

x = 30/2

x = 15 tickets

for $10 you can buy 15 tickets.

another way to solve the problem is by considering the proportion

3: 2 = x : 10

x = (3*10)/2

x= 15 tikcets