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Class 11 | CBSE | MATHEMATICS
MCQ ANSWER KEYS

MATHEMATICS CLASS 11 :

ANSWER KEY — MCQ WORKSHEET (SETS)


Correct Options


  1. (c)
  2. (c)
  3. (a)
  4. (b)
  5. (b)
  6. (c)
  7. (a)
  8. (d)

Brief Justification (Optional for Teachers)


  1. “Most intelligent students” is subjective and hence not a well-defined set.

  2. In

    \[ A = \{1,\;3,\;5,\;7\} \]

    only 5 belongs to A.

  3. Natural numbers satisfying

    \[ x^2 < 20 \]

    are

    \[ 1,\;2,\;3 \]

  4. Even numbers can be written as

    \[ x = 2n \]

    where

    \[ n \in N \]

  5. Repetition is not allowed in a set. Hence,

    \[ \{B,\;E,\;T,\;R\} \]

    is correct.

  6. The set of all even integers has infinitely many elements.

  7. All integers between −2 and 2 are listed.

  8. The letter

    \[ y \]

    is not a vowel.

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