A bag has 4 red balls,2yellow balls and 3 blue balls. a ball is drawn from the bag without looking into the bag .what is the probability of getting a non blue ball. PLEASE ANSWER FAST VERY URGENT I WILL MARK AND FOLLOW PLEASE

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?