# Ex 14.3, 4 - Chapter 14 Class 11 Mathematical Reasoning

Last updated at May 29, 2018 by Teachoo

Last updated at May 29, 2018 by Teachoo

Transcript

Ex 14.3, 4 State whether the “Or” used in the following statements is “exclusive “or” inclusive. Give reasons for your answer. Sun rises or Moon sets. We know that Sun rises in morning . At the same time ,moon sets Hence both can happen simultaneously Hence it is inclusive (However in NCERT Answer, it is mention that it is exclusive definition i.e. either of 2 is possible) Ex14.3, 4 State whether the “Or” used in the following statements is “exclusive “or” inclusive. Give reasons for your answer. (ii) To apply for a driving licence, you should have a ration card or a passport. A person can have ration card or a passport or both to apply for a driving license. Hence , here ’Or’ is inclusive. Ex14.3, 4 State whether the “Or” used in the following statements is “exclusive “or” inclusive. Give reasons for your answer. (iii) All integers are positive or negative. All integers either positive or negative but cannot be both. Hence, here ‘Or’ is exclusive.

Inclusive and exclusive or

Chapter 14 Class 11 Mathematical Reasoning

Concept wise

- Statements
- Writing negation of statements
- Negation - Checking if true or not
- Finding Compound Statement
- Words 'And' & 'Or'
- Inclusive and exclusive or
- Quantifiers
- Contrapositive and converse
- If then
- If and only if
- Proving not true/false (by giving counter examples)
- Proving True - If and only if
- Proving True - By Contrapositive
- Proving True - By Contradiction
- Necessary and sufficient condition

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Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.