Final answer:
The mixture that is also in an equivalent ratio is option b: 1 white and 1/2 blue.
Step-by-step explanation:
The equivalent ratios are ratios that represent the same value. To determine which of these mixtures is in an equivalent ratio, we need to compare the ratios of white to blue in each option.
a. 5 white and six blue - This ratio is not equivalent because it cannot be simplified.
b. 1 white and 1/2 blue - This ratio is equivalent because it can be simplified to 2 white and 1 blue.
c. 4 white and 3 blue - This ratio is not equivalent because it cannot be simplified.
d. 1.5 white and 2 blue - This ratio is not equivalent because it cannot be simplified.
Therefore, the correct answer is option b. 1 white and 1/2 blue.