Suppose someone shoots a basketball three times, let represent the event
" the -th hit " ,
Try describing the following events:
(1) ;
(2) ;
(3) ;
(4) ．
Solution: According to the definition of random events and the operation rules of events , we have
(1) At least one of the three shots was missed;
(2) Both the first and second shots were missed;
(3) Exactly two consecutive shots were made;
(4) At least one shot was made.
