The following are the ages of 50 people in a private school whose blood group is '0':20,45,31,47,22,49,60,55,38,33,7 9,18,35,36,33,22,56,65,48,41,51,69, 63,78,73,50,52,44,46,43,18,15,25,74 ,33,34,51,60,40,19,19,53,31,32,52,2 4,74,39,41,25. a)Using a class interval of 11-20,21-30, i)construct a frequency table for distribution ii)draw a histogram for the age distribution b)identity the modal class ii)Use your histogram to estimate the mode of the distribution​

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?