A medical research survey categorizes adults as follows: - by gender (male or fe

Question

A medical research survey categorizes adults as follows:

- by gender (male or female) - by age group (age groups are 18-25, 26-35, 36-50, 51+)

- by income (less than 30k/year, 30k-60k/year, more than 60k/year)

- for women only: by whether they have been pregnant (yes/no)

- for men only: by frequency of undergoing prostate exams (frequently, rarely, never).

What minimum size of a set of adults will guarantee that there are two people in it with matching characteristics in all categories? You do not need to explain your answer.

Explanation / Answer

minimum size=2*4*3*2*3=144

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