The updated balance on 6/17 can be calculated by subtracting the withdrawal and adding the deposit from the previous balance.
Starting balance: $3,000
Withdrawal on 6/17: $0
Deposit on 6/17: $750
New balance on 6/17:
$3,000 - $0 + $750 = $3,750
So, the updated balance of the check register on 6/17 is $3,750.
Therefore, the correct answer is A) $3,500.