Maharashtra State BoardHSC Arts 12th Board Exam
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Write the negation of the following. 11 < 15 and 25 > 20 - Mathematics and Statistics

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Sum

Write the negation of the following.

11 < 15 and 25 > 20

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Solution

Let p: 11 < 15,
      q: 25 > 20
Then the symbolic form of the given statement is p∧q.
Since ∼ (p ∧ q) ≡ ∼ p ∨ q, the negation of the given statement is:
11 `≥` 15 or 25 `≤` 20

Concept: Negations of Compound Statements
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