Question
The difference between the compound interest, compounded
annually and simple interest on Rs. ‘P’ at the rate of 20% p.a. for 2 years, is Rs. 100. If Rs. (P + 1500) is invested at the same rate p.a., then find the compound interest, compounded annually earned after 3 years.Solution
Using formula Difference = Sum(R/100)2 Or, 100 = P(20/100)2 Or, 100 = P(400/10000) Or, 0.0400P = 100 Or, P = 2500 Sum that is invested on compound interest = 2500 + 1500 = Rs. 4000 Compound interest = 4000(1 + 20/100)3 – 4000 = 4000 × (6/5) × (6/5) × (6/5) – 4000 = 6912 – 4000 = Rs. 2912
- The average age of (x + 6) students is 14 years. When a 36-year-old principal joins, the average age increases by 1 year. Find x% of 500.
The average of 10 numbers is 21.8. The average of the last four numbers is 15. If the average of the first five numbers is 23, then what is the value of...
The average age of a class of 23 girls is 15 years. If 2 new girls having average age of 10 years join the class, then the average age of the class beco...
- 6 students ‘P’, ‘Q’, ‘R’, ‘S’, ‘T’ and ‘U’ took part in a quiz competition. The average score of all 6 was 72 marks. The average sc...
Average run scored by a batsman in 60 innings is 180. In next 6 innings, he scored runs with an average of ‘x’ so that his overall average increases...
Average age of company A is 23 years and average age of both companies A and B is 15 years. If the ratio of number of employees in company A and B is 3:...
Average runs scored by 11 players in a match were 35. Average runs scored by players except Virat and Rohit, was 26. Runs scored by Virat were 53 more t...
60% of 3840 +? + 30% of 4380 = 40% of 8340 + 10% of 3480
Shivam bought 22 notebooks for Rs.1290 from shop A and 13 notebooks for Rs.1335 from shop B. What is the average price he paid per book?
The average marks of a class of 40 students were 75. When the marks of 5 students were removed, the average marks of the remaining students became 72. W...
Relevant for Exams:
