See
https://www.jiskha.com/questions/1786542/A-study-was-made-of-200-preschoolers-to-determine-if-they-watched-some-particular
Venn diagrams help to visualize the various subsets of the population.
google is your friend, for examples.
Surely your text has illustrations.
Once you have identified the various unknowns, you can solve algebraically. Then you can answer any questions about probabilities and so forth
What is a Venn diagram good for?
I’m trying to use one for this problem
A study was made of 200 preschoolers to determine if they watched some particular television shows. The choices were Little Galileo, Super Reader and Prehistoric Train. The results are
I. 22 preschoolers did not watch any of these shows
II. 73 preschoolers only watched Little Galileo
III. 136 preschoolers watched Little Galileo
IV. 14 preschoolers only watched Super Reader and Prehistoric Train
V. 31 preschoolers only watched Little Galileo and Prehistoric Train
VI. 63 preschoolers watch Super Reader
VII. 135 preschoolers do not watch Prehistoric TraiHow many students are in the event Watches Little Galileo and Super Reader?
1 answer