At a school there are 10 students taking only Chemistry, 9 students taking only Physics, 5 students taking both, and 16 students not taking either. If a student is randomly selected from the school, what is the probability that they are taking Chemistry or Physics? Cinarli​

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.