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Set theory – 2017 JAMB-UTME mathematics past question 21

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Set theory – 2017 JAMB-UTME mathematics past question 21

If U = {1, 2, 3, ………10} and N = {2, 4, 6, 8, 10},

Find

A. {1, 2, 3, 5, 9}

B. {1, 3, 5, 7, 9}

C. {1, 2, 3, 5, 7, 9}

D. {1, 3, 5, 7}

QUICK ANSWER…

B

SOLUTION 

If the universal set U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

And N = {2, 4, 6, 8, 10}

Therefore, complement of N which are elements in the universal set not found in N = N´ = {1, 3, 5, 7, 9}

RELATED!  Given: M = {1, 2, 3, 4, 5} N = {1, 2, 4, 5, 3}...

Now for the right answer to the above question:

  1. Option A is incorrect.
  2. Option B is correct.
  3. C is incorrect.
  4. D is not the correct answer.

QUICK TIPS…

You may please note these/this:

  • Complement of a set is another set containing elements which can be found in the universal set but not in the set.

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/culled from 2017 JAMB-UTME mathematics past question 21 /

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