This article explains the concept of proportions asked in various bank exams & other competitions.
When two ratio are equal, a = c , then a, b, c, d are said to be in proportion
If a = c , then following is also true:
If a/b= c/d= e/f = k then, by the law of equal ratios, a+c+e = k
Proportions
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When two ratio are equal, a = c , then a, b, c, d are said to be in proportion
b d
If a, b, c and d are in proportion, then a × d = b × c
Operations on Proportions
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If a = c , then following is also true:
b d
b = d (Invertendo)
a c
a = b (Alterendo)
c d
a+b = c+d (Componendo, by adding 1 to both sides of original equality)
b d
a-b = c-d (Dividendo, by subtracting 1 to both sides of original equality)
b d
a+b = c+d (Componendo and Dividendo, dividing above two equalities)
a-b c-d
Law of Equal Ratios
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If a/b= c/d= e/f = k then, by the law of equal ratios, a+c+e = k
b+d+e
dear mam is it enough to practice previous year papers to get good marks in cgl ...i am appearing for cgl first time
ReplyDeleteNo, it depends on person to person. The more you practice, the better chances of scoring more.
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