Isabel Briggs Myers was a pioneer in the study of personality types. The personality types are broadly defined according to four main preferences. Do married couples choose similar or different personality types in their mates? The following data give an indication Similarities and Differences in a Random Sample of 375 Married Couples
Number of Similar Preferences Number of Married Couples
All four 27
Three 126
Two 122
One 65
None 35

Suppose that a married couple is selected at random.
a. Use the data to estimate the probability that they will have 0, 1, 2, 3, or 4 personality preferences in common.
b. Do the probabilities add up to 1? Why should they?
c. What is the sample space in this problem?