Question

Given that B = {1, 2, 3, 4}, how many subsets have exactly two elements?

Answer 1

The answer is 6

There are 6 subsets that have exactly two elements

Answer 2

Answer:

6

Step-by-step explanation:

{1,2}     {2,1}     {3,1}     {4,1}

{1,3}     {2,3}    {3,2}     {4,2}

{1,4}     {2,4}     {3,4}    {4,3}

Remove duplicates {2,1}, {3,1}, {4,1}, {3,2}, {4,2}, {4,3}

Final Answer = 6 subsets remain