Niko has a jar of candy containing strawberry, butterscotch, and root beer flavors. If there are 10 strawberry, 13 butterscotch, and 7 root beer candies, which ratio shows the quantity of the strawberry -flavored candy to the total number of candies Niko owns?

A. 10:13
B. 10:30
C. 13:40
D. 7:30

The total number of candies Niko owns is 10 + 13 + 7 = <<10+13+7=30>>30.

The ratio of the strawberry-flavored candy to the total number of candies is 10:30.
Therefore, the answer is B. 10:30.

To determine the ratio of strawberry-flavored candy to the total number of candies Niko owns, we need to add up the quantities of all three flavors.

The total number of candies Niko owns is:
10 (strawberry) + 13 (butterscotch) + 7 (root beer) = 30 candies

Therefore, the ratio of the strawberry-flavored candy to the total number of candies Niko owns is:
10 (strawberry) : 30 (total number of candies)

Simplifying the ratio, we get:
1 : 3

Therefore, the correct ratio is B. 1:3, which can also be expressed as 10:30.

To determine the ratio of the quantity of strawberry-flavored candy to the total number of candies Niko owns, we need to calculate the total number of candies first.

The total number of candies Niko owns is the sum of the strawberry, butterscotch, and root beer candies:
Total Number of Candies = Number of Strawberry Candies + Number of Butterscotch Candies + Number of Root Beer Candies

Given:
Number of Strawberry Candies = 10
Number of Butterscotch Candies = 13
Number of Root Beer Candies = 7

Total Number of Candies = 10 + 13 + 7 = 30

Now that we have the total number of candies, we can calculate the ratio of strawberry-flavored candy to the total number of candies:

Strawberry Candy Ratio = Number of Strawberry Candies : Total Number of Candies

Using the values we calculated earlier:
Strawberry Candy Ratio = 10 : 30 = 1 : 3

Therefore, the correct answer is B. 10:30, which represents the ratio of the quantity of the strawberry-flavored candy to the total number of candies Niko owns.