Question 14 Marks
A page of Passbook of Mrs. C. Malik Savings Bank Account in year 2002 is given below:
If the rate of interest decreases from 5% to 4% with effect from June 1st, 2002, compute the interest at the end of the year.
| Date Year 2002 | Particulars | Amount Withdrawn (in ₹) | Amount Deposited (in ₹) | Balance (in ₹) |
| Jan. 1 | By Balance | - | - | 2,100·00 |
| Jan. 7 | By Cash | - | 1,000·00 | 3,100·00 |
| Feb. 1 | By Cash | - | 500·00 | 3,600·00 |
| Feb. 15 | To Cheque | 2,000·00 | - | 1,600·00 |
| March 15 | By Cash | - | 2,000·00 | 3,600·00 |
| March 20 | To Cheque | 1,000·00 | - | 2,600·00 |
| June 12 | By Cash | - | 3,000·00 | 5,600·00 |
| June 28 | To Cheque | 1,000·00 | - | 4,600·00 |
| Oct. 15 | To Cheque | 3,000·00 | - | 4,600·00 |
| Nov. 5 | By Cash | - | 1,500·00 | 3,100·00 |
| Dec. 10 | By Cash | - | 500·00 | 3,600·00 |
| Dec. 20 | To Cheque | 1,000·00 | - | 2,600·00 |
Answer
View full question & answer→As per entries of the Passbook page of Mrs. C. Malik, we have:

Qualifying amount for interest at the rate of 5 % = ₹ 11,500. .....(from January to May)
∴ Interest = ₹ $\frac{11,500 \times 5 \times 1}{100 \times 12}$ = ₹47.92
Qualifying amount for interest at the rate of 4% = ₹ 23,700. ...0...(from June to December)
∴ Interest = ₹ $\frac{23,700 \times 4 \times 1}{100 \times 12}$ = ₹ 79
∴ Interest at the end of the year = ₹ 47.92 + ₹ 79 = ₹ 126.92

Qualifying amount for interest at the rate of 5 % = ₹ 11,500. .....(from January to May)
∴ Interest = ₹ $\frac{11,500 \times 5 \times 1}{100 \times 12}$ = ₹47.92
Qualifying amount for interest at the rate of 4% = ₹ 23,700. ...0...(from June to December)
∴ Interest = ₹ $\frac{23,700 \times 4 \times 1}{100 \times 12}$ = ₹ 79
∴ Interest at the end of the year = ₹ 47.92 + ₹ 79 = ₹ 126.92
