Correct option is D
Given Series: 47, 64, 448, ?, 2315, 2328, 6987
47 to 64: 47+17=64
64 to 448: 64×7=448
448 to ?:
Following an alternating pattern (addition and then multiplication), we might try adding 15 here.
448+15= 463
463 to 2315: 463×5=2315
2315 to 2328: 2315+13=2328
2328 to 6987: 2328×3=6984
This pattern of alternating addition and multiplication fits, with the missing number being 463.
Correct answer: (d) 463