To find the probability that Grace picks a grape-flavored candy, you can use the formula for probability:
\[ \text{Probability} = \frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}} \]
In this case:
- The number of grape-flavored candies (favorable outcomes) is 15.
- The total number of candies is the sum of grape-flavored and lemon-flavored candies: \(15 + 10 = 25\).
Now, substitute these values into the probability formula:
\[ \text{Probability of picking a grape-flavored candy} = \frac{15}{25} \]
Now, simplify the fraction:
\[ \frac{15}{25} = \frac{3}{5} \]
So, the probability that the candy she picks will be grape-flavored is \(\frac{3}{5}\).