1. The problem is to find the total number of berries in the cluster shown, which consists of 3 strawberries and 6 blueberries. 2. To find the total number of berries, we use the formula for the sum of two quantities: $$\text{Total berries} = \text{Number of strawberries} + \text{Number of blueberries}$$ 3. Substitute the given values: $$\text{Total berries} = 3 + 6$$ 4. Simplify the sum: $$\text{Total berries} = 9$$ 5. Therefore, the cluster contains 9 berries in total.