Marla filled up her car's gas tank and then went on a trip. After she drove 329 miles, she filled her tank with 14 gallons of gas. If she drove the same number of
miles on each gallon of gas, how many miles per gallon did she drive?
A. 23 miles per gallon
B. 23 miles per gallon
C. 24 miles per gallon
D. 24 1/2 miles per gallon

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?