CBSE Class 11 - Maths - Sets - NCERT Exercise 1.6 (#class11Maths)(#eduvictors)

Sets - NCERT Exercise 1.6 Answers 

Class 11 Maths

Q1: If X and Y are two sets such that n( X ) = 17, n( Y ) = 23 and n( X ∪ Y ) = 38, find n ( X ∩ Y ).

Answer: Given,
n( X ) = 17,
n( Y ) = 23 and
n( X ∪ Y ) = 38

We know that, n(X ∪ Y) = n(X)  + n(Y) - n (X ∩ Y)
∴  38 = 17 + 23  - n (X ∩ Y)
⇒ n (X ∩ Y) = 17 + 23 - 38 = 40 - 38 = 2
∴ n (X ∩ Y) = 2.

Class 9 - Economics - People As Resource (MCQs) (#eduvictors)(#class9Economics)

People As Resource (MCQs)Class 9 - Economics

People as a resource is a way of referring to to the country's working population in terms of their existing productive skills and abilities.

Here are MCQs along with explanations to assess your knowledge about the chapter.

CBSE Class 10 - Physics - Magnetic Effects of Electric Current (Worksheet)(#class10Physics)(#eduvictors)

Magnetic Effects of Electric Current (Worksheet)

CBSE Class 10 - Physics

Fill in the blanks

1. The space around a magnet in which the force of attraction and repulsion due to the magnet can be detected is called the _____________.

2. Outside a bar magnet, the magnetic field lines tend to start from _______ pole  and reach ________ pole. Thus these field lines form _______ loops.

3. The region where the field lines are close together will have _______ magnetic field.

4. Is magnetic field a vector quantity? (Yes/No)

CBSE Class 11 Maths Sets - NCERT Exercise 1.5 Answers (#class11Maths)(#eduvictors)

Sets - NCERT Exercise 1.5 Answers 

CBSE Class 11 Maths 

Q1: Let U = { 1, 2, 3, 4, 5, 6, 7, 8, 9 }, A = { 1, 2, 3, 4}, B = { 2, 4, 6, 8 } and C = { 3, 4, 5, 6 }. 
Find 
(i) A'
(ii) B'
(iii) (A ∪ C)'
(iv) (A ∪ B)'
(v) (A')'
(vi) (B – C)'


Answer:
(i) A' =  U - A = {5,6,7,8,9}

(ii) B'  = U - B = {1,3,5,7,9}

CBSE Class 6,7,8 - English - Reading Comprehension (Set-14)(#readingcomprehension)(#eduvictors)

English - Reading Comprehension (Set-14)

Level: Easy 

Directions: Read the following passage carefully and the answer the MCQs given below.

BEES

Bees are insects. Bees are special insects because they can fly! They can move through the air like an aeroplane! Bees can fly because they have wings. They use their wings to fly. Bees can fly fastly.Bees can also fly slowly. They can fly up and they can fly down. They need to fly to get to the flowers. Bees can have three colours. They can be yellow, red and orange. All bees are black in some places. Bees have three main parts. They have a head. They have a body. And, they have a stinger. The stinger is used to defend against enemies. They also have six legs. They use their legs to climb and stand. They also use their legs to eat and collect pollen. Bees live in many places. They live in Africa, Australia, Asia, Europe, North America, and South America. The only continent that bees do not live on is Antarctica! I understand why they don’t live in Antarctica. It’s too cold! Most of the time, bees are nice to humans. If you do not bother them, they will not bother you. Have fun watching bees this summer.

Class 10 - Economics - Sectors of Indian Economy Q & A (Part-3) (#eduvictors)(#class10economics)

Sectors of Indian Economy Q & A (Part-3)

Class 10 - Economics

The part-3 video post covers the following questions:
Q1. What do you mean by disguised employment? Explain with an example.

Q2. Distinguish between open unemployment and disguised unemployment.

Q3. How can more employment be created in rural areas?

Q4. How can more employment be created in urban areas?

Q5. On the basis of employment conditions how economic activities are classified?

Q6. Compare the employment conditions prevailing in organised and unorganised sectors.

Q7. "There is a need for protection and support to the workers in an unorganised sector". Who are these vulnerable people who need protection?

Q8. How can the workers in unorganised sectors be protected?
The video includes MCQs also.

CBSE Class 7 Maths - Chapter 9 - Rational Numbers (Worksheet)(#class7Maths)(#eduvictors)

Chapter 9 - Rational Numbers (Worksheet)

CBSE Class 7 Maths

Fill in the blanks

1. A rational number is a number that can be written in the form p/q, where p and q are ________ and q ____ 0.


2. The ________ of a rational number can never be zero.


3. The rational number _______ is neither negative nor positive.

English Vocabulary - Commonly Confused Words (Part-5) (#eduvictors)(#EnglishVocabulary )

Commonly Confused Words 

(Part-5)

English Vocabulary 

English is full of phrases or words, which sound the same or comparable yet have distinctive meanings and are sometimes confusing too. Here is the third list of commonly confused words.

Biannual, Biennial
Biannual is twice in one year,
Biennial means every two years

CBSE Class 8 - Science - Chapter 18 - Pollution of Air and Water (Worksheet)(#eduvictors)(#class8Science)

Pollution of Air and Water (Worksheet)

CBSE Class 8 - Science - Chapter 18

All organisms including plants, animals (including human beings) and micro-organisms live in a habitat and interact with the ecosystem. Both biotic and abiotic components constitute environment. A harmful change in environment due to pollution cause discomfort and affect the lives of living beings.

Fill in the blanks

1. Substances that cause harmful changes in the air, soil or water are called ___________.


2. Incomplete burning of fossil fuels, like petrol and diesel, results in the production of colourless, odourless and toxic gas called ______________.


3. ________ is a mix, in the air, of smoke and chemicals with fog.


4. CFCs contribute to the depletion of the ________ layer that protects us from the harmful ultraviolet rays of the sun.

CBSE Class 11 Maths Chapter Sets - NCERT Exercise 1.4 (Q 9 - Q 12) (#eduvictors)(#class11Maths)

Class 11  Maths Chapter Sets - NCERT Exercise 1.4 (Q 9 - Q 12)

NCERT Solutions

Q9: If A = {3, 6, 9, 12, 15, 18, 21}, 
  B = { 4, 8, 12, 16, 20 },
C = { 2, 4, 6, 8, 10, 12, 14, 16 }, 
D = {5, 10, 15, 20 }; 
find
(i) A – B 
(ii) A – C 
(iii) A – D 
(iv) B – A
(v) C – A 
(vi) D – A 
(vii) B – C 
(viii) B – D
(ix) C – B 
(x) D – B 
(xi) C – D 
(xii) D – C


Answer: 
(i) A – B    = {3, 6, 9, 15, 18, 21}

(ii) A – C  = {3, 9, 15, 18, 21}

(iii) A – D = {3, 6, 9, 12, 18, 21}

(iv) B – A  = {4, 8, 16, 20}

(v) C – A  = {2,4,8,10,14,16}

(vi) D – A = {5,10,20}

(vii) B – C = {20}

(viii) B – D = {4,8,12,16}

(ix) C – B = {2,6,10,14}

(x) D – B  = {5,10,15}

(xi) C – D = {2,4,6,8,12,14,16}

(xii) D – C = {5,15,20}