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In an election, two candidate’s A and B contested. A got 60% of the votes. The total votes were 8000. How many votes did each get?

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The seed

The seed After fertilization, ovaries develop into fruits and ovules into seeds. Seed contain a baby plant called an embryo and reserve food in fleshy parts called cotyledons. An embryo has two important parts plumule and redicle. Seeds have small scar on its surface called hilum. This is the point where seeds are attached to the fruit wall( . . .

The fruit

The fruit The fruit is the ripened ovary. Tomato, pumpkin and pea all are fruits not just vegetables. A vegetable can be any part of plant root, stem, leaf or fruit which can be cooked and eaten. Apple and pear are different kinds of fruits, in these , the base of flower becomes the main fleshy part of fruit, which we eat while the ovary rem . . .

Question: A shopkeeper buys an article for rs 8,000 and sells it for rs 10,000. If the rate of Tax under VAT is 10%, find tax paid by the shopkeeper, tax charged by the shopkeeper and VAT paid by the shopkeeper.

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Question: A bicycle is available for rs 1,664 including Tax. If the list price of the bicycle is rs 1,600, find the rate of Tax and the price, a customer will pay for the bicycle if the Tax is increased by 6%.

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Question: The price of an article is rs 8250 which includes Tax at 10%. Find how much more or less does a customer pay for the article, if the Tax on the article increases to 15% and decreases to 6%.

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A society collected Rs 9,216; each member contributed as many rupees as there were member in society. Find the number of members.

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Some Important Chemical Compounds

There are so many chemical compounds which are widely used in chemistry and play an important role in our domestic life, Industries and in analytical chemiatry. Following is the list of such compounds with their chemical formula, chemical name & common name. . . .

Blood Corpuscles (Platelets)

Thrombocytes (Platelets) Structure • Minute, oval or round, non - nucleated Count • 200,000 to 400,000 per mm3   Production & death • Budded off from some giant cells (megakaryotes) in red bone marrow. • Life span is 3 to 5 days • Destroyed mainly in spleen   Function • Helps in blood clott . . .

Blood Vessels

Artery Carries oxygenated blood away from the heart towards organs. Narrow lumen. Blood flow with jerk due to ventricular systole. Progressively branched & decreasing in size. Smallest artery breaks in to arterioles. Thick, muscular & elastic walls. Have no valve in inner linings. Constricts & dilate to control blood flow . . .

Light & dark adaptation by Eye

Light & dark adaptation Dark adaptation • When a person come in a dark room from a bright lighted area it is difficult to see objects for some time after that the vision is improved & the person can see objects clearly. • This is done by (i) The regeneration of visual purple (rhodopsin), the pigment of rods, which was earlier broke . . .

Reactivity of Metals

Different metals show different reactivity towards different chemical compounds. Following chart shows the chemical properties of metals.  . . .

Blood Clotting

Blood Clotting - Coagulation of blood at wound to prevent excess loss of blood. Clotting occurs in a series of steps as follows - 1. At the site of wound, platelets release an enzyme thrombokinase or thromboplastin (also called Factor 'X' or Stuart factor) 2. Thrombokinase along with calcium ion present in blood plasma, conver . . .

A man, after a tour, finds that he had spent every day as many rupees as the number of days he had been on tour. How long did his tour last, if he had spent in all Rs 1,296?

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ANTIBIOTICS

ANTIBIOTICS An antibiotic is a chemical substance produced by a living organism which can stop the growth of some disease producing bacteria and fungi. Antibiotics  are widely used in the treatment of numerous infections. Ex. Streptomycin, chloromycetin, tetracycline and penicillin. Penicillin is the first produced antibiotic. It is the . . .

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