Human 3

Human bones are 3/10 living tissues 9/20 minerals, and the rest water. What fraction of human bone is water?

Correct answer:

w =  0.25

Step-by-step explanation:

$w=1-{\displaystyle \frac{3}{10}}-{\displaystyle \frac{9}{20}}={\displaystyle \frac{1}{4}}=0.25$

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