Pharmacy

The pharmacy adds 3 liters of 95 percent alcohol and 5 liters of 38.04 percent alcohol. How much percent alcohol did the pharmacy get?

Correct answer:

p =  59.4 %

Step-by-step explanation:

V1​=3 l V2​=5 l  r1​=95%=10095​=2019​=0.95 r2​=38.04%=10038.04​=0.3804  V=V1​+V2​=3+5=8   V1​⋅ r1​+V2​⋅ r2​ = p/100 ⋅  V  L=V1​⋅ r1​+V2​⋅ r2​=3⋅ 0.95+5⋅ 0.3804=125594​=4.752 l  p=100⋅ VL​=100⋅ 84.752​=59.4%

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You need to know the following knowledge to solve this word math problem:

statisticsalgebrabasic operations and conceptsUnits of physical quantitiesthemes, topicsGrade of the word problem

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