When Lillian goes bowling, her scores are normally distributed with a mean of 130 and a standard deviation of 11. Using the empirical rule, what percentage of the games that Lillian bowls does she score between 119 and 141?

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?