In a mixture of 3 parts flour and 5 parts water, what fraction of the mixture is flour?

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Multiple Choice

In a mixture of 3 parts flour and 5 parts water, what fraction of the mixture is flour?

Explanation:
This uses the idea that a mixture described by parts has its fraction equal to the number of parts of interest divided by the total parts. There are 3 parts flour and 5 parts water, so the total number of parts is 3 + 5 = 8. The flour portion of the mixture is 3 out of those 8 parts, which is 3/8. That means flour makes up 3/8 of the mixture (0.375). The other options would correspond to different interpretations: 5/8 would be the water fraction, 5/3 would exceed the whole, and 3/5 would assume a total of 5 parts, not 8.

This uses the idea that a mixture described by parts has its fraction equal to the number of parts of interest divided by the total parts. There are 3 parts flour and 5 parts water, so the total number of parts is 3 + 5 = 8. The flour portion of the mixture is 3 out of those 8 parts, which is 3/8. That means flour makes up 3/8 of the mixture (0.375). The other options would correspond to different interpretations: 5/8 would be the water fraction, 5/3 would exceed the whole, and 3/5 would assume a total of 5 parts, not 8.

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