A commercial paper was deducted at a discount rate of 10% annually for (120 days), so the correct discount amounted to (50) dinars. 

Required:

 1- Nominal value 

2- Commercial discount. 

Q 2: An investment company deposited the following amounts in one Banks: Using the tiger and denominator method 

Amount     Interest rate    Deposit date    Balance date 

2000            10 %                  1/2/2021             4/4/2021

3000            4000                  6/8/2021           25/8/2021 

Required: 

1- Total balance with valid interest 

2- Total balance with commercial interest