Rita rolled a die 25 times. Her results are shown in the table attached: 1. What is the experimental probability P(2)?

2. What is the experimental probability P(4)?

3. What is the experimental probability of rolling a 2 or a 3?

4. What is the experimental probability of rolling an even number?

5. What is the theoretical probability of rolling an even number?

6. Find the experimental probability P(1, 2, 3, 4, 5, 6).

7. Find the theoretical probability P(1, 2, 3, 4, 5, 6).

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?