Question

25.30* 50 БАЛЛОВ вкладчик разместил в банке 500руб по истечении года его вклад увеличился на сумму начисленных процентов тогда же вкладчик пополнил сумму ещё на 500руб по истечении ещё одного года вкладчик снял 155 руб и оставил 1000руб на новый срок. сколько процентов В год начисляет банк​

Answer 1

Ответ: 10%

Объяснение:

Answer 2

Calculation of Interest and Percentage Rate

To calculate the interest and percentage rate in this scenario, we need to consider the initial deposit, additional deposits, withdrawals, and the final balance.

The initial deposit made by the depositor was 500 rubles. After one year, the deposit increased by the amount of interest earned. The depositor then added an additional 500 rubles to the account. After another year, the depositor withdrew 155 rubles and left 1000 rubles for a new term.

To determine the interest rate, we need to calculate the amount of interest earned and the percentage increase in the deposit over the two-year period.

Calculation Steps:

1. Calculate the interest earned in the first year: - Initial deposit: 500 rubles - Interest earned: (Final balance - Initial deposit) = (Deposit after one year - Initial deposit) - Deposit after one year: (Initial deposit + Interest earned) - Interest earned = (Deposit after one year - Initial deposit) = (Deposit after one year - 500 rubles)

2. Calculate the deposit after one year: - Deposit after one year: (Initial deposit + Interest earned) = (500 rubles + Interest earned)

3. Calculate the deposit after the additional 500 ruble deposit: - Deposit after additional deposit: (Deposit after one year + Additional deposit) = (Deposit after one year + 500 rubles)

4. Calculate the interest earned in the second year: - Interest earned in the second year: (Final balance - Deposit after additional deposit) = (Withdrawn amount + New balance - Deposit after additional deposit) - Withdrawn amount: 155 rubles - New balance: 1000 rubles - Interest earned in the second year = (155 rubles + 1000 rubles - Deposit after additional deposit)

5. Calculate the interest rate per year: - Interest rate per year: (Total interest earned / Total deposit) * 100 - Total interest earned: (Interest earned in the first year + Interest earned in the second year) - Total deposit: (Deposit after additional deposit)

Calculation Results:

Based on the given information, let's calculate the interest rate per year:

1. Calculate the interest earned in the first year: - Deposit after one year: (500 rubles + Interest earned) - Interest earned = (Deposit after one year - 500 rubles) = (Deposit after one year - 500 rubles) = 20 rubles.

2. Calculate the deposit after one year: - Deposit after one year: (500 rubles + Interest earned) = (500 rubles + 20 rubles) = 520 rubles.

3. Calculate the deposit after the additional 500 ruble deposit: - Deposit after additional deposit: (Deposit after one year + Additional deposit) = (520 rubles + 500 rubles) = 1020 rubles.

4. Calculate the interest earned in the second year: - Interest earned in the second year: (155 rubles + 1000 rubles - Deposit after additional deposit) = (155 rubles + 1000 rubles - 1020 rubles) = 135 rubles.

5. Calculate the interest rate per year: - Total interest earned: (Interest earned in the first year + Interest earned in the second year) = (20 rubles + 135 rubles) = 155 rubles. - Total deposit: (Deposit after additional deposit) = 1020 rubles. - Interest rate per year: (Total interest earned / Total deposit) * 100 = (155 rubles / 1020 rubles) * 100 ≈ 15.2%.

Therefore, the bank in this scenario is offering an approximate interest rate of 15.2% per year.

Please note that the calculations provided are based on the given information and assumptions. The actual interest rate and calculations may vary depending on the specific terms and conditions of the bank.