**Question: **Remember our sample of pages in this book from the earlier Just Checking? 48% of pages had a data display. 27% of pages had an equation, and 7% of pages had both a data display and an equation.

a) Make a contingency table for the variables display and equation.

b) What is the probability that a randomly selected sample page with an equation also had a data display?

c) Are having an equation and having a data display disjoint events?

d) Are having an equation and having a data display independent events?

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