Question

Let U be the set of all integers from 1 to 20. Let A = {1, 3, 6, 9, 12, 15, 18} and B = {2, 9, 11,
20). Which choice describes the set {4, 5, 7, 8, 10, 13, 14, 16, 17, 19)?

Answer 1

Answer:

the answer is A prime that is a set containing all the numbers in the universal set that can't be found in A

it is like removing A from the universal set

Answer 2

The resulting sets are not found in the set  {4, 5, 7, 8, 10, 13, 14, 16, 17, 19), therefore the choice that describes the set of numbers is (A U B)'

Set theory

Sets is a collection of numbers of elements

Given the following sets

A = {1, 3, 6, 9, 12, 15, 18} and

B = {2, 9, 11, 20).

U = {integers from1 to20}

From the given sets:

A U B ={1,2,3, 6, 9, 11, 12,25, 18, 20}

The resulting sets are not found in the set  {4, 5, 7, 8, 10, 13, 14, 16, 17, 19), therefore the choice that describes the set of numbers is (A U B)'

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