times
1.I have to pay 3 times tution than local students.
2.I have to pay a 3-time tution than local students.
3.I have to pay 3 times of tution than local students.
4.I have to pay a tripple tution than local students.

Which one is correct and natural?
Thank you!

Question

times
1.I have to pay 3 times tution than local students.
2.I have to pay a 3-time tution than local students.
3.I have to pay 3 times of tution than local students.
4.I have to pay a tripple tution than local students.

Which one is correct and natural?
Thank you!

Answer

I have to pay tuition 3 times as much as a local student pays...

Answer

I have to pay three times the tuition of local students.
I have to pay three times more tuition than local students.