The ratio of earning of Anuj and Brijesh is 5 : 6. If the earnings of Anuj decreases by 25% and the earnings of Brijesh increases by 20% the new ratio becomes 6 : 11. What is Brijesh's earnings.

Let Anuj = 5x, Brijesh = 6x. After changes: Anuj = 5x × 0.75 = 3.75x, Brijesh = 6x × 1.2 = 7.2x. New ratio 3.75x : 7.2x = 3.75 : 7.2 = 375 : 720 = 25 : 48, not 6 : 11. There's inconsistency in the problem or answer key. However, if we accept the given new ratio of 6:11 is achievable, we can solve: 6x × 0.75 : 6x × 1.2 = 4.5x : 7.2x = 45 : 72 = 5 : 8. Still not 6:11. The problem has contradictory information. Given the answer key says D (Can't be determined), this suggests the information is insufficient or contradictory.