Final answer:
To find the number of blueberries, divide the number of strawberries by the scale factor of the ratio and then multiply by the number of blueberries in the ratio.
Step-by-step explanation:
To find the number of blueberries, we need to use the ratio 3:7 and the given number of strawberries, which is 161. To find the number of blueberries, divide the number of strawberries by the scale factor of the ratio and then multiply by the number of blueberries in the ratio.
First, we need to find the scale factor by adding the two parts of the ratio together, which gives us 3+7 = 10. Next, we divide the number of strawberries by the scale factor: 161/10 = 16.1. Finally, we multiply the scale factor by the result to find the number of blueberries: 16.1 * 3 = 48.3. Since we can't have a fractional number of blueberries, we round down to 48. Therefore, there are 48 blueberries.