PERCENTAGE QUESTION

Mathematics
Tutor: None Selected Time limit: 1 Day

May 11th, 2015

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May 11th, 2015

Suppose

a = volume of 25% drink (pints)
b = volume of 75% drink (pints)
25a + 75b = 45*40 = 1800

Suppose

a + b = 40
a = 40 - b

25a + 75b = 1800

Substituting value for a

25(40 - b) + 75b = 1800

1000 - 25b + 75b = 1800

1000 + 50b = 1800
50b = 800
b = 16 pints

a = 24 pints


May 11th, 2015

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