Answer:
D
Step-by-step explanation:
Since it goes B and then C it is safe to assume the letters are going in alphabetical order. Therefore, the next letter would be D.
Make a ratio, then cross multiply.
4/30=x/48
30x=4x48
30x=192
x=6.4
Solve by back-calculating for the missing number . . . (58 - 7 - 14 + 3)/(5 × 2) = 4