Blaire, Chen, Erin, Liz, and Mauro all participate in a 1-mile race. The average (arithmetic mean) for the times of all girls is 6.5 minutes. If the average time for Blaire, Chen, and Erin is 6.7 minutes, what is the average time for Liz and Mauro?
Blaire, Chen, Erin, Liz, and Mauro all participate in a 1-mile race. The average (arithmetic mean) for the times of all girls is 6.5 minutes. If the average time for Blaire, Chen, and Erin is 6.7 minutes, what is the average time for Liz and Mauro?