A frozen yogurt shop surveyed 20 customers on their favorite yogurt flavor. Four chose peanut butter, 6 chose vanilla, 8 chose chocolate mint, and 2 chose lemon. A customer from this group is selected at random. What is the probability that the customer’s favorite flavor is peanut butter? PLEASE HELP

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?