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A magician makes potions by combining maple syrup from a magical maple tree with ordinary water. The magician starts with a large supply of two potions: a red potion, which is 50% magical syrup by volume (and the rest is just water), and blue potion, which is 10% magical syrup by volume. (Perhaps you're wondering how the same syrup can produce both red and blue potions. That's why it's magic syrup!)

(a) Find the amount of red potion (in mL) that must be added to 200 mL of blue potion in order to produce potion that is 30% magical syrup by volume.

(b) Find the amounts of red potion and blue potion (in mL) that can be combined in order to produce 150 mL of a potion that is 30% magical syrup by volume.

(c) Does there exist a combination of red potion and blue potion that can produce a potion that is 20% magical syrup by voume?

 
 Nov 20, 2022
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Let the number of mL of 50% potion = F

Then, the number of mL of 10% potion =200 - F

 

0.50F  +  0.10[200 - F] =200 * 0.30, solve for F

 

F = 100 mL of 50% potion will be needed.

200 - 100 ==100 mL of 10% potion will be needed

 

P.S. Try and solve the other 2. They are very easy.

 
 Nov 20, 2022

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