Give your answers to parts (b), (c) and (d) to the nearest whole number.
Harinder has 14 000 US Dollars (USD) to invest for a period of five years. He has two options of how to invest the money.
Option A: Invest the full amount, in USD, in a fixed deposit account in an American bank.
The account pays a nominal annual interest rate of r % , compounded yearly, for the five years. The bank manager says that this will give Harinder a return of 17 500 USD.
Option B: Invest the full amount, in Indian Rupees (INR), in a fixed deposit account in an Indian bank. The money must be converted from USD to INR before it is invested.
The exchange rate is 1 USD = 66.91 INR.
The account in the Indian bank pays a nominal annual interest rate of 5.2 % compounded monthly.
Calculate the value of r.
* This question is from an exam for a previous syllabus, and may contain minor differences in marking or structure.
(M1)(A1)
Note: Award (M1) for substitution into the compound interest formula, (A1) for correct substitution. Award at most (M1)(A0) if not equated to 17500.
OR
N = 5
PV =±14000
FV = 17500
P/Y = 1
C/Y = 1 (A1)(M1)
Note: Award (A1) for C/Y = 1 seen, (M1) for all other correct entries. FV and PV must have opposite signs.
= 4.56 (%) (4.56395… (%)) (A1) (G3)
[3 marks]
Calculate 14 000 USD in INR.
14000 × 66.91 (M1)
Note: Award (M1) for multiplying 14000 by 66.91.
936740 (INR) (A1) (G2)
Note: Answer must be given to the nearest whole number.
[2 marks]
Calculate the amount of this investment, in INR, in this account after five years.
(M1)(A1)(ft)
Note: Award (M1) for substitution into the compound interest formula, (A1)(ft) for their correct substitution.
OR
N =60
I% = 5.2
PV = ±936740
P/Y=12
C/Y= 12 (A1)(M1)
Note: Award (A1) for C/Y= 12 seen, (M1) for all other correct entries.
OR
N=5
I% = 5.2
PV= ±936740
P/Y=1
C/Y= 12 (A1)(M1)
Note: Award (A1) forC/Y= 12 seen,(M1)forallother correct entries
= 1214204 (INR) (A1)(ft) (G3)
Note: Follow through from part (b). Answer must be given to the nearest whole number.
[3 marks]
Harinder chose option B. At the end of five years, Harinder converted this investment back to USD. The exchange rate, at that time, was 1 USD = 67.16 INR.
Calculate how much more money, in USD, Harinder earned by choosing option B instead of option A.