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/sci/ - Science & Math

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4967298 No.4967298[DELETED]  [Reply] [Original]

Heya, /sci/, can you help me to do this problem? I've always been shit for maths. Double check this?

>A national brand contains 30% cranberry juice. Amanda would like to make 20 liters of a drink that contains 65% cranberry juice. How many liters of pure cranberry juice would it take to obtain her 65% mixture?

Because she needs 65%, which is twice and a sixth again her starting ratio of 30%, the ratio of mixture (30%), henceforth M, to concentrate (henceforth C), 100, is 6:13, yes? So adding 6 liters of M and 13 liters of C will end up with 19 liters, so you need another liter, which will be 7/13's C. So the final answer would be 13+7/13, right?

Sorry again to bother you with something that must be so easy to math titans like you guys... Pic unrelated.

>> No.4967302

You can skip the calculations. She will fuck it up, because she's a woman.

>> No.4967305

>>4967302
Wrong. Amanda is a guy's name.

>> No.4967311

Bump. This shit is supposed to be easy.

>> No.4967321

C'mon /sci/... you guys are smart...

>> No.4967333

Bump. Imma take this to /b/ soon

>> No.4967338
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4967338

>Homework threads

>> No.4967344

>>4967338
>dat gif

Which anime is it from?

>> No.4967349

>>4967344
what

>> No.4967351

She really shouldn't be using the crap national brand cocktail blend to try to make a drink with even more cranberry juice. There is something wrong with her brain.

>> No.4967348

read the question again. what sort of juice is she starting with?

Hint: it's not 35%

>> No.4967354

>>4967348
What the fuck
How did you know that

>> No.4967361

>>4967348
Wait, but I didn't put 35%, I put 30%

>> No.4967374

10

>> No.4967833

The first sentence about the national brand is completely unimportant. All you need to know is the desired amount and mixture level. So the equation would be x * 100% = 20 * 65%, or 1x = 20 * .65. So, the answer is 13 liters of pure cranberry juice. (I think)