Given:
Gary, Sindhu, and Beth are all waiting for their train to arrive
Gary’s train leaves at five minutes before noon
So, the time of Gary's train is: 11:55 am
Sindhu's leave at 25 minutes afternoon
So, Sindhu leaves at 12:25 pm
Beth's leave 5 minutes before Sindhu's train
So, Beth's leave at 12:20 pm
So, the order who will leave first is as follows:
Gray, Beth, and Sindhu