Multiple choice

A bank offers 10% compound interest per four months. A customer deposits Rs 5000 each on 1st January, on 1st April and on 1st August of a year. At the end of the year, find the amount he would have gained by means of interest? एक बैंक प्रति चार माह 10% चक्रवृद्धि ब्याज की पेशकश करता है। एक ग्राहक एक वर्ष मे 1 जनवरी, 1 अप्रैल और 1 अगस्त को 5000 रुपये जमा करता है। वर्ष के अंत मे ब्याज के माध्यम से उसे कितनी राशि का लाभ होता है?

  1. Rs.1050 1050 रुपये

  2. Rs.3205 3205 रुपये

  3. Rs.5000 5000 रुपये

  4. Rs.2500 2500 रुपये

  5. None of these इनमें से कोई नहीं
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

10% CI per 4 months means rates: 10% for 4 months, 21% for 8 months (1.1²-1), 33.1% for 12 months (1.1³-1). Deposits: Jan 1 (3 periods): 5000 × 1.331 = 6655. Apr 1 (2 periods): 5000 × 1.21 = 6050. Aug 1 (1 period): 5000 × 1.1 = 5500. Total maturity = 6655 + 6050 + 5500 = 18205. Principal = 15000. Interest = 18205 - 15000 = 3205.

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