A leisure centre is offering two trips of a week in duration (two different weeks), one in scotland and the other in andalusia.
There are 140 children who wish to travel.
Of this number 92 opt for scotland trip and 105 for andalusia's one. One randomly takes 1 of the 140 application forms. One marks A the event "signed up for the andalusian trip" and E the event "signed up for the scottish trip".
Are events A and E independent of one another?