Mathematics

13 April, 04:13

A group of four people has to cross a bridge. It is dark, and they have to light the path with a flashlight. No more than two people can cross the bridge simultaneously, and the group has only one flashlight. It takes different time for the people in the group to cross the bridge: Chris crosses the bridge in 1 minute,

Tracy crosses the bridge in 2 minutes,

Ashley crosses the bridge in 5 minutes,

Jalen crosses the bridge in 10 minutes.

How can the group cross the bridge in 17 minutes?

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