Four hundred draws will be made at random with replacement from the box 1 3 5 7 .
(a) estimate the chance that the sum of the draws will be more than 1,500.
(b) estimate the chance that there will be fewer than 90 3 ’s.

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?