Question

9. José invirtió $4,000 a un año en dos cuentas de ahorro con interés simple. Invirtió $2,500 al 9% de interés y el resto a una tasa de interés diferente. Si el total de intereses recibidos es de $315, ¿cuál fue la tasa de la segunda cuenta? widi renlver 16 problemas al aluninn más destacado de la

Jose invested 4,000 a year in two savings accounts with simple interest. Invested 2,500 at 9% interest and the rest at a different interest rate. If the total interest received is $ 315. What was the rate of the second account?

Answer 1

Investment in first account = $2,500

total investment = $4,000

Investment in second account = Investment in first account - total investment

= 4,000-2,500

= $1,500

Interest rate in first account = 9%

Interest rate in second account = K%

Total interest = $315

Total interest = Investment in first account x Interest rate in first account + Investment in second account x K%

315 = 2,500 x 9% + 1,500 x K%

315 = 225+15K

15K = 90

K = 6%

Rate of second account = 6%

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