Consider the following for any three non empty sets A, B and C1 \d | Filo
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Class 11

Math

Calculus

Sets

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Consider the following for any three non empty sets A, B and C



which of the above is/are correct?

  1. Only 1
  2. 2 and 3
  3. 1 and 2
  4. 1 and 3
Correct Answer: Option(b)
Solution: 1. 

for all  and x  B ) or x  A and x  B and X  C)

Hence not correct 

2.
\displaystyle \Rightarrow X\varepsilon (A\  and \ x \notin B)

3. 




Hence (1) is incorrect, 
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