John has a bag of marbles that contains 12 red marbles 20 green marbles and 17 blue marbles if john pulls one marble out of the bag what is the probability that it will not be red? that is p (not red)?

what is the probability that he will draw a purple marble? that is p (purple)?

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?