A sum of money triples itself in 6 years when invested at a certain rate of compound interest. In how many years will it amount to twenty-seven times itself?
In 6 years = doubles itself =3 Let the amount be sixteen times in ‘x’ years. ATQ- 6 years – 3 times X year – 27 times =33 X =6×3 =18 years.
Average age of 25 students is 15 years. If 5 students leave the class, the average age decreases by 1 year. Find the average age of the students who lef...
The average salary of 36 employees ( Teachers+principals) in a School is Rs.10,375. A Principal in the School receives a salary that is 125% higher than...
The average of n numbers is 66. If each of 54% of the numbers is increased by 13 and each of the remaining numbers is decreased by 12, then the n...
The average age of 15 children and their teacher's age are 12 years. If the teacher's age is excluded, the average reduces by 2. What is the teacher's age?
The average salary of all males and females in an office is Rs.16000 and the total number of females in the office is 16. If the average salaries of mal...
The average cost of three chairs is Rs.11000. The average cost decrease by 20% when one more chair is included. What is the cost price of the 4th
There are three distinct numbers ‘a’, ‘b’ and ‘c’. If, a = 150, (a + b) = 450 and (c – b) = 60, then find the average of a, b and c.
...The average score obtained by 22 students in a class test is 68 marks. The top place was shared by 3 people who got the same score. If the lowest score ...
Average 20 numbers is ‘x’. If the average of first 12 numbers is 72.5 while average of last 5 numbers is 86.8 and 13th, 14th a...
The average age of a group of 10 friends is 27 years. If one friend leaves the group, the average becomes 25years. Find the age of the friend who left t...
