En una parada de autobús pasa un autobús que va al centro de la ciudad, otro que va al centro comercial y otro que va al aeropuerto. El primero pasa cada 15 minutos, el segundo pasa cada 18 y el tercero pasa cada 6min. ¿Después de cuantos minutos vuelven a coincidir?

Solve the problem by using a venn diagram a group of students were surveyed about their taste in music. they were asked how they like three types of music: rock, country western and jazz. the results are summarized below: no one dislikes all three types of music. six like all three types of music. eleven don’t like country western. sixteen like jazz. three like country western and jazz, but not rock. six don’t like rock. eight like rock and country western. seven don’t like jazz. how many students were surveyed?