The correctly punctuated sentence is:
Andre went on vacation; he had a great time.
Responses
Andre went on vacation he had a great time.
Andre went on vacation he had a great time. - incorrect
Andre went on vacation he had a great time . . .
Andre went on vacation he had a great time . . . - no response given
Andre went on vacation, he had a great time.
Andre went on vacation, he had a great time. - no response given
Andre went on vacation; he had a great time.
1 answer
The correctly punctuated sentence is:
Andre went on vacation; he had a great time.