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Ratio of the earnings of A and B is 4 : 7 respectively. If the earnings of A increase by 50% and the earnings of B decrease by 25% the new…

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Ratio of the earnings of A and B is 4 : 7 respectively. If the earnings of A increase by 50% and the earnings of B decrease by 25% the new ratio of their earnings becomes 8 : 7 respectively. What are A?s earnings ?
  • ARs. 26,000
  • BRs. 28, 000
  • CRs. 21,000
  • DData inadequate
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0
CCommunity
Solution
Let earnings of A = Rs. $400x$
and earnings of B = Rs. $700x$
=> A's new earnings after 50% increase = $\frac{150}{100} * 400x = 600x$
B's new earnings after 25% decrease = $\frac{75}{100} * 700x = 525x$
Ratio = $\frac{600x}{525x} = \frac{8}{7}$
But, their total earnings are unknown. Hence A's earnings can't be known
=> Data inadequate.
0
CCommunity
Solution
Let earnings of A = Rs. $400x$
and earnings of B = Rs. $700x$
=> A's new earnings after 50% increase = $\frac{150}{100} * 400x = 600x$
B's new earnings after 25% decrease = $\frac{75}{100} * 700x = 525x$
Ratio = $\frac{600x}{525x} = \frac{8}{7}$
But, their total earnings are unknown. Hence A's earnings can't be known
=> Data inadequate.