Four people want to cross the bridge but each person takes time crossing it. Jerry takes 1 minute, John takes 2 minutes, Jade takes 5 minutes and Kim takes 10 minutes. When a person will cross the bridge, he/she must be with a person and a person must go back to return the flashlight on the other side. When crossing, the person with the longest time will be added Example: Kim(10 minutes)and John (5 minutes) so 10 minutes will be added. Do it in less than 17 minutes. Tell who is with who and who will come back to return the flashlight.

Mr. Williams has two children. If the older child is a boy, what are the odds that the other child is also a boy?