Question 10

In a certain country, 10-digit telephone numbers with the following format were introduced: Digits may be repeated. 10.1 How many possible 10-digit telephone numbers could be formed? 10.2 Certain restrictions were placed on the groups of digits: Area code: must be 3 digits and the first digit can NOT be 0 or 1 Exchange code: … Read more

Question 6

6.1 On 31 January 2020, Tshepo made the first of his monthly deposits of RI 000 into a savings account. He continues to make monthly deposits of RI 000 at the end of each month up until 31 January 2032. The interest rate was fixed at 7,5% p.a., compounded monthly 6.1.1 What will the investment … Read more