Correct Answer - Option 2 : Rs. 218
Let the pocket money (in Rs.) of A, B and C be 3x, 4x and 5x.
Since their initial average pocket money was Rs. 84,
[3x + 4x + 5x] / 3 = 84
3x + 4x + 5x = 84 ⨯ 3 = 252
∴ 12x = 252
∴ x = 21
Hence, if Rs. 50 is to be given to A and C, total amount they will now get together = 3x + 5x + 50
= 8x + 50 = (8 ⨯ 21) + 50 = 168 + 50 = 218
Hence, ‘218’ is the correct answer.