Andrea spins two fair 6-section spinners. The sections are labeled 1 to 6. On the first spun on both spinners, the sum of the two numbers selected was 7. On the second spun on both spinners, the sum of the two numbers selected was 10. Which sum is more likely to occur?

Group of answer choices
the sum equal to 10 is more likely to occur

the sum equal to 7 is more likely to occur

both are equally likely to occur

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?