Question

I /have /great confidence / on you (spot the error)​

Answer 1

Answer:

error- on you

right one- in you

i have a great confidence in you

gud afternoon^_^

Answer 2

Answer:

I have great confidence on you. This is a wrong statement. The words 'on you' are wrong.

The correct statement is  

I have great confidence in you.

Explanation:

When you say you have confidence in someone, you mean you have great faith and trust in them. The right usage of having confidence in someone will be the usage,  I have confidence in you.

This is the right usage of the preposition 'in and not 'on', in the sentence.