To calculate the percentage of students who scored a B or higher, we first need to sum the scores for A, B, C, D, and F.
The scores are:
- A = 8
- B = 12
- C = 5
- D = 3
- F = 2
First, calculate the total number of students:
\[ \text{Total} = A + B + C + D + F = 8 + 12 + 5 + 3 + 2 = 30 \]
Next, determine how many students scored a B or higher:
\[ \text{Students scoring B or higher} = A + B = 8 + 12 = 20 \]
Now, calculate the percentage of students who scored a B or higher:
\[ \text{Percentage} = \left( \frac{\text{Students scoring B or higher}}{\text{Total}} \right) \times 100 = \left( \frac{20}{30} \right) \times 100 \]
\[ \text{Percentage} = \frac{20}{30} \times 100 = \frac{2000}{30} \approx 66.67% \]
Rounding to the nearest tenth, the result is:
\[ \text{Percentage} \approx 66.7% \]
Therefore, the answer is 66.7%.