Q. The ratio of the earnings of A and B is 4 : 7 respectively. If the earnings of A increase by 50% and the earning of B decrease by 25% the new ratio of their earning becomes 8 : 7 respectively. What are A's earning?

1. 24000
2. data inadequate (अपर्याप्‍त आकड़े)
3. 30000
4. 40000