zorelkara zorelkara

01-10-2017
Mathematics

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if 120 marks is 60% what is full marks

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jdoe0001 jdoe0001

01-10-2017

let's say is "x", so, then "x" is the 100%, and we know that the 60% is 120, what the dickens is "x" anyway?

[tex]\bf \begin{array}{ccll} marks&\%\\ \text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\ x&100\\ 120&60 \end{array}\implies \cfrac{x}{120}=\cfrac{100}{60}\implies x=\cfrac{120\cdot 100}{60}[/tex]

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