SOLUTION: a pharmacist has 40 ml of a 25% antibiotic solution and needs to dilute it to a 10% solution. How many ml of water should she add

Question 1049766: a pharmacist has 40 ml of a 25% antibiotic solution and needs to dilute it to a 10% solution. How many ml of water should she add
Found 2 solutions by Alan3354, ikleyn:
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
a pharmacist has 40 ml of a 25% antibiotic solution and needs to dilute it to a 10% solution. How many ml of water should she add
==========
Add W ml of water.
Then,
40*25 + W*0 = (40 + W)*10

Answer by ikleyn(52788)   (Show Source): You can put this solution on YOUR website!
There is entire bunch of the lessons covering various types of mixture problems
    - Solving typical word problems on mixtures for solutions
    - Typical word problems on mixtures from the archive
    - OVERVIEW of lessons on word problems for mixtures
in this site.

Read them and become an expert in solution the mixture word problems.

Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

It contains many other solved word problems, as well as many other interesting and useful things.

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