Total number of students = 200

Number of boys =  of the total students

Number of girls =  of the total students =

Let cost price of an article = 100 unit

Profit = 8%

Selling price of the article = 100 unit + 8 unit = 108 unit

When profit = 12%

Selling price of the article = 100 unit + 12 unit = 112 unit

According to question

⇒ 4 unit = Rs. 3

⇒ 1 unit = Rs.

Ratio of two selling prices =

125% of the student’s marks = 75

100% of the student’s marks = (75/125) x 100 = 60

Hence, Required marks = 60

⇒ p = 4k

⇒ q = 3k

LCM (p,q) = (4k,3k) = 12k

According to question

⇒ 12k = 36

⇒ k = 3

hence, p = 12

q = 9

⇒ p+q =12+9 = 21

Number of persons who read novels = 45

Number of persons who read poems = 37

⇒ 8 do not read either novels or poems.

Number of persons who read both poem and novels = (45+37) – (85 -8) = 82 – 77 = 5

3.0 × 0.3 × 0.03 × 0.003

= 3⁴× (10)^-6

= 81× (10)^-6

Hence, option D is the correct answer.

x-16=16-2x

3x=32

x=32/3=

To find descending/ascending order. First we have to make all the denominator somehow equal.

By taking LCM of denominators the number will be

2/3 = 40/60

3/4 = 45/60

4/5 = 48/60

1/2 = 30/60

Therefore, the descending order will be

4/5 , 3/4 , 2/3 , 1/2

Hence option D is correct.

We can write the above equation in the following way-

(73)² + (42)² - 2 × 73 × 42 {we know (a-b)² = a² + b² -2ab}
=(73 - 42)²

=(31)²

=961

Option A is correct.

Let the price of 1kg sugar and rice are x kg and y kg. Respectively.

According to question, 12x = 6y

2x = y ......... (1)

And 10x + 8y = Rs.1,040 ....... (2)

From equation (1) and (2), we have

x = Rs.40

● Bhimbekta caves are approximately 30000 years old Paleolithic and Mesolithic period cave.

● Its is located in Raisen district of Madhya Pradesh.

● It is alos UNESCO world heritage site consisting seven hills and over 750 rock shelters.

• Brahmo Samaj is a reformist movement of the Hindu religion that appeared during the Bengal Renaissance.
• It was started at Calcutta on 20 August 1828 by Raja Ram Mohan Roy and Debendranath Tagore.

* Chand bibi was an Indian warrior who fought against Badshah Akbar. She was from Ahmednagar, Maharashtra.

* She fought against Akbar’s forces in 1595.

* Chand Bibi was married to Ali Adil Shah I of the Bijapur Sultanate.

* The Jallianwallah Bagh Massacare was ordered by Colonel Reginald Dyer.

* The Jallianwala Bagh massacre took place on 13 April 1919, killing over 400 people and injuring over 1000 people.

* People gatheres for peacefull protest against the arrest and deportation of two national leaders, Satyapal and Saifuddin Kitchlew.

* Vasco da Gama reached Calicut, India on 20th May, 1498.

* He becomes the first European to reach India via the Atlantic Ocean when he arrives at Calicut on the Malabar Coast.

* His initial voyage to India was the first to link Europe and Asia by an ocean route, connecting the Atlantic and the Indian oceans.

● Torah is the religious text of the Jews.

● Granth Sahib is the sacred scripture of Sikhism.

● The Dhammapada is a collection of sayings of the Buddha.

● Tripitaka is the sacred book of Buddhism.

● 1024 Gigabyte make a terabyte.

● 1024 Megabyte makes a Gigabyte.

● 1024 Kilobyte makes a megabyte.

● Tropism is a directional movement of plant organs due to growth, induced by an external factor.

● The movement can be toward or away from the inducer, but the path is not predetermined.

● There are several types of tropism including phototropism, geotropism, chemotropism, hydrotropism etc.

* Calcium Carbonate is insoluble in water.

* Chemical formula of calcium carbonate is CaCO3.

* In presence of carbon dioxide calcium carbonate reacts with water.

* Calcium Carbonate is used as an antacid.

* Reverse osmosis is the process used to purify the water.

* Osmosis is the movement of a solvent across a semipermeable membrane towards lower concentration of solvent.

* Reverse Osmosis is a process by which a solvent passes through a membrane towards higher concentration of solvent.

* In reverse osmosis solvent moves in opposite direction to that of osmosis due to high pressure.

* Apollo 11 was a lunar mission of NASA to landed humans on the moon.

* Apollo 11 was the first spaceflight to landed humans on the moon.

* Apollo 11 was launched in 1969.

* Apollo 11 carried Neil Armstrong and Edwin E Aldrin Jr, Michael Collins.

● Production of Silk originated in China.

● China, India, Uzbekistan, Brazil, Japan etc. are the major silk producing countries in the world.

● The process of silk production is known as sericulture.

● Methyl Mercury pollutants in water cause “Minamata disease”.

● Some common symptoms include numbness in the hands and feet, general muscle weakness, damage to hearing and speech.

● It is a poisoning disease that affects mainly the central nervous system.

• A light pen is a light-sensitive pointing input device commonly used to select or otherwise modify text or data on a screen.
• Used with a CRT monitor, these devices were an early form of manipulating and highlighting data on the screen.

● A chemical reaction is called Exothermic reaction when heat is given out.

● It occurs when the temperature of a system increases due to the evolution of heat.

● Endothermic reactions are chemical reactions in which the reactants absorb heat energy from the surroundings to form products.

● Optical fiber works on the principle of Total Internal Reflection.

● An optical fiber is a cylindrical dielectric waveguide that transmits light along its axis.

● Total Internal Reflection is the phenomenon that involves the reflection of all the incident light off the boundary.