Question
An amount of Rs. ‘P’ was invested at an interest
rate of ‘R%’ per annum, compounded annually. After 2 years, the compound interest earned was Rs. 2700 and the simple interest earned was Rs. 2400. What is the value of ‘P’?Solution
ATQ,
Simple interest for 1 year = 2400 ÷ 2 = Rs. 1200 Difference between compound interest and simple interest after 2 years = 2700 – 2400 = Rs. 300 So, R = (300 ÷ 1200) × 100 = 25% Now, P = 1200 ÷ 0.25 = Rs. 4800
- The average of series 'S2', which consists of 6 consecutive even numbers, is 29. The second term of series 'T2', which consists of 5 consecutive odd number...
- Average of 10 quantities is 35. If two extra quantities are added whose average is 'x', the new average rises by 10%. Find the value of 'x'.
- The average of the first three numbers is twice the average of the next six numbers. If the average of all nine numbers is 20, then find the sum of the las...
The mean weight of 24 men is 45 kg, while the mean weight of 18 women is 40 kg. Calculate the combined average weight of all the ...
The average age of 13 girls is 40 years. If the age of one more girl is added the average decreases by half a year. What is the age of new girl?
The average age of a group of 70 students is 14 years. If three students whose ages are 22years, 20years, ________ years is replaced with three new stud...
The average score of 28 players in a team is 73. After two new players with scores (x + 8) and (x - 6) joined, the average score decreased by 2 points. ...
In a workshop of 50 participants, the average age is 40 years. One participant aged 38 leaves, and 5 new participants with an average age of 44 join. Wh...
Average 20 numbers is ‘x’. If the average of first 12 numbers is 64.5 while average of last 5 numbers is 86.6 and 13th, 14th a...
If average weight of a class is ‘y’ kg. If a new student weighing 21 kg took admission, then the average weight is increases by 1 kg. If the...
