Average = Total sum ÷ Number of items.<br><br>
&bull; Sum = 0.3 + 4.1 + 7.6 + 7.7 + 9.0 = 28.7 L<br>
&bull; Number of items = 5<br>
&bull; Average = 28.7 ÷ 5 = 5.74 L<br><br>
Final Answer: 5.74 L