GMAT Club Official Solution:Marta received a one time cash bonus from her employer. She paid part of the bonus in taxes, spent 28,000 euros, and saved the rest. What was the total amount of Marta’s bonus?(1) Marta saved 24 percent of the bonus.
If Marta saved 24 percent of the bonus, then the remaining 76 percent covers both taxes and the 28,000 euros she spent. Since we are not told how that 76 percent is split between taxes and spending, the total bonus is not determined. Not sufficient.
(2) Marta paid 1/5 of the bonus in taxes and after paying the taxes, she saved 3/10 of the money that remained.[/quote]
Let the bonus be T.
Taxes = (1/5)T, so the amount remaining after taxes is (4/5)T.
She then saved (3/10) * (4/5)T = (6/25)T.
So the amount she spent is T - (1/5)T - (6/25)T = (14/25)T.
Given that she spent 28,000 euros, we have (14/25)T = 28,000, so T = 28,000 * 25/14 = 50,000. Sufficient.
Answer: B.