Question

A = {multiples of 3 between 20 and 32}
B = {odd numbers between 20 and 32}
C = {even numbers between 20 and 32}
a) List the members of AUB
Note: Please clearly label you
b) List the members of Anc
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Answer 1

Answer:  a) A U B =  {21, 23, 24, 25, 27, 29, 30, 31}

               b) A ∩ C = {24, 30}

Step-by-step explanation:

A = {21, 24, 27, 30}

B = {21, 23, 25, 27, 29, 31}

C = {20, 22, 24, 26, 28, 30, 32}

  I included 20 and 32 even though they are not strictly BETWEEN 20 & 32

A U B means the union of the two sets, which includes everything from both sets.

A U B = {21, 24, 27, 30} U {21, 23, 25, 27, 29, 31}

          = {21, 23, 24, 25, 27, 29, 30, 31}

A ∩ C means the intersection of the sets - only those values that are in both sets.

A ∩ C = {21, 24, 27, 30} ∩  {20, 22, 24, 26, 28, 30, 32}

          = {24, 30}