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13-03-2015
Mathematics

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If 80% is 60 marks, what is full marks

Respuesta :

13-03-2015

Set up a proportion:

0.80/60 = 1/x

Cross multiply:

0.80x = 60

Divide 0.80 to both sides:

x = 7.5

Multiply by 100:

x = 75

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