Question

Set A contains 17 elements, set B contains 20 elements, and 6 elements are common to sets A and B. How
many elements are in A or B?

Answer 1

Answer:

  31

Step-by-step explanation:

There are 17-6 = 11 elements in Set A that are not also in Set B. Those togeter with Set B comprise all of the elements of either set.

  11 + 20 = 31 . . . elements in A or B