What ratio of rice priced at $0.7 per pound should be combined with rice priced at $1.0 per pound to achieve a mixture that costs $0.85 per pound?
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thank you taking time to upload it!
Thanks for sharingThank you for sharing!!thanks for sharing
thanks, this one was pretty quick once I set it up as a weighted average.
Wait, is the ratio 0.7 rice to 1.0 rice? I got the answer but just want to make sure I read it the right way around, the wording always trips me up.
yeah it's cheaper : expensive. i always label it before solving to avoid flipping it.
the 0.85 being exactly halfway between 0.70 and 1.00 is the whole trick here. felt easy for this range.
huh, i initially overcomplicated this with variables but the midpoint thing made it click. is there a fast way to spot when it's just the average?
if target is exactly the midpoint of the two prices then it's equal parts, so 1:1. works whenever the gap is symmetric.
nice, that saves me like a minute when the numbers are clean like this.
What it tests
Your ability to convert between fractions, ratios, and decimals and to reason proportionally.
Common trap
Cross-multiplying incorrectly or mixing up the ratio parts — a part:part ratio is not a fraction of the whole.