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, Chad, Erin, and Jordan randomly arranged in four seats at the front row of the classroom. What is the probability that Chad and Blaire are sitting next to each other?
Blaire, Chad, Erin, and Jordan randomly arranged in four seats at the front row of the classroom. What is the probability that Chad and Blaire are sitting next to each other?
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?