Answer:
$8.15/hour.
Step-by-step explanation:
The total salary payout is 10 * $8.25 = $82.50 / hour.
After one leaves the total is 82.50 - 6.50 = $76.
The new employee makes the total 76 + 5.50 = $81.50.
The new mean salary is 81.50 / 10
= $8.15/hour.