D Skipping rope E50 meters running f Standing long jump A Geography (A, D) (A, E) (A, F)B Biology (B, D) (B, E) (B, F)C History (C, D) (C, E) (C, F) Method 2: Draw a tree diagram as follows:
All possible outcomes
(2) As can be seen from the table or tree diagram, there are nine possible outcomes * * *, in which event M has appeared once, so P(M)= 19.