Q69.The mean and variance of the data 4, 5, 6, 6, 7, 8, x, y where x < y are 6 and 49 respectively. Then x4 + y2 is equal to (1) 320 (2) 420 (3) 162 (4) 674
What This Question Tests
This question assesses the understanding of basic logical connectives and the definition of a tautology, which can be solved using truth tables or logical equivalences.
Concepts Tested
Formulas Used
p ∧ (~p) ≡ F
p ∨ (~p) ≡ T
F ∧ A ≡ F
T ∨ A ≡ T
📚 NCERT Sections This Tests
12.5 — A Hydrogen Atom Initially In The Ground Level Absorbs A Photon,
Physics Class 12 · Chapter 12
12.5 A hydrogen atom initially in the ground level absorbs a photon, which excites it to the n = 4 level. Determine the wavelength and frequency of photon.
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Chemistry Class 11 · Chapter 5
5.15 Discuss the nature of bonding in the following coordination entities on the basis of valence bond theory: (i) [Fe(CN)6] 4– (ii) [FeF6] 3– (iii) [Co(C2O4)3]3– (iv) [CoF6] 3–
8.17 — Complete Each Synthesis By Giving Missing Starting Material, Reagent Or Products
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8.17 Complete each synthesis by giving missing starting material, reagent or products
📋 Question Details
- Chapter
- Mathematical Reasoning
- Topic
- Logical connectives and tautology
- Year
- 2022
- Shift
- 27 Jun Shift 2
- Q Number
- Q69
- Type
- MCQ
- NCERT Ref
- Class 11 Mathematics Ch 14: Mathematical Reasoning
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