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?
Pick one
A) 8:5
B) 8:8
C) 8:3
D) 8:7
E) 8:1
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:8:7
<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?