A sum of money is borrowed and paid back in two annual installments of Rs. 882 each allowing 5% C.I. The sum borrowed was?	Choose the correct answer.
A) Rs. 1620	B) Rs. 1640	C) Rs. 1680	D) Rs. 1700	E) Rs. 1800
Principal = (P.W. of Rs. 882 due 1 year hence) + (P.W. of Rs. 882 due 2 years hence)   = [882/(1 + 5/100) + 882/(1 + 5/100)2]   = (882 * 20)/21 + (882 * 400)/441 = Rs. 1640.   ANSWER:Rs. 1640
<result>B</result>
A sum of money is borrowed and paid back in two annual installments of Rs. 882 each allowing 5% C.I. The sum borrowed was?