My brother studies at a college during the day and works at a restaurant in the evenings.
(State whether correct or incorrect)

I GUESS IT MIGHT BE INCORRECT,

THE CORRECT SENTENCE MAY BE : MY BROTHER STUDIES AT A COLLEGE DURING THE DAY AND WORKS AT A RESTAURANT IN THE EVENING.

I AM NOT SURE WHETHER IT IS CORRECT OR INCORRECT. 

According to me this sentence is correct.

That was incorrect....
My brother study at a college in day and works at a resturant in the evenings .

Sorry studies at a college in day time & works in a resturant in evenings