Archives

If A And B Are Not Disjoint Sets Then N A Union Of B Is Equal To

1) n (A) + n (B) 2) n (A) + n (B) - n (A ∩ B) 3) n (A) + n (B) + n (A ∩ B) 4) n (A) + n (B) + n (A + B) 5) n (A) - n (B) Solution: (1) If... View Article

Given N U 20 N A 12 N B 9 N A Intersection Of B 4 Where U Is The Universal Set A And B Are Subset Of U Then N A Union Of B C

1) 17 2) 9 3) 11 4) 3 5) 16 Solution: n (U) = 20, n (A) = 12, n (B) = 9, n (A ∩ B) = 4 n (A ∪ B) = n (A) + n (B) - n (A ∩ B) = 12 + 9 -... View Article

Let A And B Be Two Sets Such That N A 0 16 N B 0 14 N A Union Of B 0 25 Then N A Intersection Of B Is Equal To

1) 0.3 2) 0.5 3) 0.05 4) None of these Solution: (3) n (A ∪ B) = n (A) + n (B) - n (A ∩ B) 0.25 = 0.16 + 0.14 - n (A ∩ B) n (A ∩ B) =... View Article

If N A 3 N B 6 And A Subset Of B Then The Number Of Elements In A Union Of B Is Equal To

1) 3 2) 9 3) 6 4) None of these Solution: (3) A ⊆ B A ⋃ B = B |A ⋃ B| = |B| n (B) = 6 n (A ⋃ B) = 6... View Article

Let U Be The Universal Set And A Union Of B Union Of C U Then A B Union Of B C Union Of C A Dash Is Equal To

1) A ⋃ B ⋃ C 2) A ⋃ (B ⋂ C) 3) A ⋂ B ⋂ C 4) A ⋂ (B ⋃ C) Solution: (3) (A – B) ∪ (B – C) ∪ (C – A) will majority of the parts except for A... View Article

Let A And B Be Two Sets Then A Union Of B Dash Union Of A Dash Intersection Of B Is Equal To

1) A' 2) A 3) B' 4) None of these Solution: (1) (A ⋃ B)’ ⋃ (A’ ∩ B) = A’... View Article

If A And B Are Two Sets Then A B Union Of B A Union Of A Intersection B Is Equal To

1) A ⋃ B 2) A ∩ B 3) A 4) B' Solution: (1) (A - B) ⋃ (B - A) ⋃ (A ⋂ B) = A ⋃ B... View Article

The Shaded Region In The Given Figure Is

1) A ⋂ (B ⋃ C) 2) A ⋃ (B ⋂ C) 3) A ⋂ (B - C) 4) A - (B ⋃ C) Solution: (2) The shaded region represents A ⋃ (B ⋂ C).... View Article

A Class Has 175 Students The Following Data Shows The Number Of Students Obtaining One More Subjects Mathematics 100 Physics 70 Chemistry 40

1) 35 2) 48 3) 60 4) 22 Solution: (3) Number of students in mathematics = 100 - [12 + 18 + 10] = 100 - 40 = 60... View Article

If N A An N Belongs To N Then N 5 Intersection N 7

1) N7 2) N 3) N35 4) N5 Solution: (3) N5 ⋂ N7 = N35 [Since 5 and 7 are relatively prime numbers]... View Article

If A Is Any Set Then

1) A ⋃ A’ = ɸ 2) A ⋃ A’ = U 3) A ⋂ A’ = U 4) None of these Solution: (2) A ⋃ A’ = U... View Article

Let U Set 1 2 3 4 5 6 7 8 9 10 A Set 1 2 5 B Set 6 7 Then A Intersection Of B Dash Is

1) B’ 2) A 3) A’ 4) B Solution: (2) B’ = U - B = {1, 2, 3, 4, 5, 8, 9, 10} A ⋂ B’ = {1, 2, 5} = A A ⋂ B’ = A... View Article

What Is Meant By Coherence

What is meant by coherence? Coherence describes the relationship between the physical quantities of the wave. Two waves are said to be coherent... View Article

What Is The Function Of Capacitor

What is the function of capacitor? The basic function of a capacitor is to store charges and release the charges, whenever necessary. The... View Article

What Causes Resistance

What causes resistance? The electrical resistance of the material depends on the type of material. The other factors that cause resistance are... View Article

What Is Difference Between Mass And Weight

What is difference between mass and weight? Mass is the measure of the amount of matter present in an object. Weight is the force acting on the... View Article

Does Amplitude Affect Resonance

Does amplitude affect resonance? Resonance is the increase in the amplitude of vibration of the object when the driving frequency or external... View Article

What Is Amplitude Of Oscillation

What is the amplitude of oscillation? The amplitude of oscillation is the distance from the mean or equilibrium position to either extreme.... View Article

Can Two Wavefronts Cross Each Other

Can two wavefronts cross each other? No, wavefronts from the same source do not intersect. If the wavefronts intersect then there will be two... View Article

Do Lone Pairs Repel Each Other

Do lone pairs repel each other? Yes, lone pairs repel each other. Lone pair of electrons are the electrons in the valence shell that are not... View Article

M	T	W	T	F	S	S
	1	2	3	4	5	6
7	8	9	10	11	12	13
14	15	16	17	18	19	20
21	22	23	24	25	26	27
28	29	30	31