In Lord of the Flies how did the kids get to the island, and did they all make it there?

In this work, a group of British schoolboys are stranded on an island somewhere in the Pacific after their plane crashes. Piggy says at the opening of the novel, "I expect there's a lot more of us scattered about." It is not made clear by Golding whether or not there were other children who died in the crash. The reader does know for certain, however, that the pilot was killed in the crash. The different groups of boys join up and there becomes a struggle for leadership between Ralph and Jack. As the plot progresses, it explores the journey the boys take into the heart of evil.