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Question

If B = {1, 3, 5, 7, 9}, the set-builder representation of B is


  1. B = {x: x is a prime number less than 10}

  2. B = {x: x is an odd number less than 10}

  3. B = {x: x is an odd natural number}

  4. B = {x: x is an odd natural number less than 10}


Solution

The correct option is D

B = {x: x is an odd natural number less than 10}


Option B is wrong as the set of odd numbers less than 10 gives {-∞,- - - - -, -5, -3, -1, 1, 3, 5, 7, 9}

So, B is a set of all odd natural numbers less than 10.

=> Option D is correct

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