La unión de campesinos del estado de Veracruz comprará unas tostadoras europeas para su producción de café.
El precio de las tostadoras, que está en función del país de compra, y el
porcentaje de cobro por gastos de envío se muestran en la siguiente
gráfica.​

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?