Ratio of the earnings of A and B is 4:7. If the earnings of A increases by 50% and those of B decreased by 25%, the new ratio of their earnings becomes 8:7. What are A's earnings?	Choose the correct choice from the following.
A) 26,000  B) 83,20  C) 23,320  D) Data inadequate  E) 39,309
Answer: Option D   Explanation:   Let the original earnings of A and B be Rs. 4x and Rs. 7x.   New earnings of A = 150% 0f Rs. 4x = (150/100 * 4x) = Rs. 6x   New earnings of B = 75% of Rs. 7x = (75/100 * 7x) = Rs. 21x/4   6x:21x/4 = 8:7   This does not give x. So, the given data is inadequate.   Answer:Data inadequate
<result>D</result>
Ratio of the earnings of A and B is 4:7. If the earnings of A increases by 50% and those of B decreased by 25%, the new ratio of their earnings becomes 8:7. What are A's earnings?