La edad de Camilo supera en 20 años a la de Joaquín y equivale a 3/2 de la edad de Julián. Si la suma de las edades de
Camilo, Joaquín y Julián es de 60 años, ¿cuáles son sus edades?

Dana wants to identify the favorite professional baseball team of people in her community. she stands outside a local sporting goods store and asks every other person who enters, "what is your favorite professional baseball team? " will the results of her survey be valid? explain.