Out of five numbers A, B, C, D and E, the average of the first four numbers A, B, C and D is greater than the average of the last four numbers B, C, D and E by 35. Find the differences between A and E.
The average monthly salary of five friends is Rs. 62,000. Surinder, one of the five friends, got promotion and a hike in the salary. If the new average of their salaries is Rs. 64, 250, then how much is the increase in the monthly salary of Surinder?
The average weight of students in a class was 60.5 kg. When 8 students, whose average weight was 65 kg, joined the class, then the average weight of all the students increased by 0.9 kg. The total number of students now in the class is:
In a club there are 12 wrestlers. When a wrestler whose weight is 90 kg leaves the club, he is replaced by a new wrestler then the average weight of this 12 member club increases by 0.75 kg. What is the weight (in kg) of the new wrestler who joined the club?
The average weight of students in a class is 49kg. Five new students are admitted in the class whose weights are 45 kg, 46.8 kg, 47.4 kg, 54.2 kg and 63.6 kg. Now, the average weight of all the students in the class is 50 kg. The number of students in the class in the beginning was:
The average of a ten numbers is 72.8. The average of the first six numbers is 88.5 and the average of the last five numbers is 64.4. If the 6th number is excluded, then what is the average of the remaining numbers?
The average of 16 numbers is 68.5 If two numbers 54 and 37 are replaced by 45 and 73 and one more number x is excluded, then the average of the numbers decreases by 1.5. The value of x is:
Find the probability of getting an even prime number when a number is selected from the numbers 1 to 50
The average age of 16 students in a college is 20. Out of them, the average age of 5 students is 20 and the average age of the other 10 students is 20.4. Find the age of the 16th college student.
The average price of three items is Rs. 14,265. If their prices are in the ratio 7 : 9 : 11, then the price of the costliest item is:
The average of 24 numbers is 26. The average of the first 15 numbers is 23 and that of the last 8 number is 33. Find 16th number.
The average marks of Ravi in five subjects are 150, but in mathematics 43 was misread as 23 during the calculation. The correct average is:
Given that the mean of five numbers is 28. If one of them is excluded, the mean gets reduced by 5. Determine the excluded number.
If the average of 35 numbers is 22, the average of the first 17 numbers is 19, and the average of the last 17 numbers is 20, then the 18th number is
The average age of 25 men is 28 years. 5 new men of an average age of 25 years joined them. Find the average age of all the men together.
Average of ‘n’ observations is 38, average of ‘n’ other observations is 42 and average of remaining ‘n’ observations is 55. Average of all the observations is:
If the mean of the observations x, x + 4, x + 5, x + 7, x + 9 is 9, then the mean of the last three observations is:
In a class, the average age of 40 students is 12 years when teacher’s age is included to it, the average increases by 1. The age of teacher is :
The total weight of 12 boys and 8 girls is 1080 kg. If the average weight of boys is 50 kg, then what will be average weight of girls?
If a 32 year old man is replaced by a new man,then the average age of 42 men increases by 1 year. What is the age of the new man?
The average weight of 12 boxes is 63 kg. If four boxes having an average weight of 70 kg are removed, then what will be new average weight of the remaining boxes?
The average of numbers N1 and N2 is 17. The average of numbers N2 and N3 is 44. What is the difference between N3 and N1?
The average age of 50 teachers of a school is 66 years and the average age of 60 teachers of another school is 55 years. What will be average age of teachers of both the schools together?
A box contains 6 black and 4 white balls. If a ball is taken from it, what is the probability of it being white?
A box contains 6 black and 4 white balls. If a ball is taken from it, what is the probability of it being black?
The simple interest on Rs. 6,000 in 4 years at R% interest per annum is equal to the simple interest on Rs.. 9,000 at the rate of 12% per annum in 2 years. What is the value of R?
A sum becomes Rs. 34400 in 6 years on simple interest at the rate of 12 percent per annum. What is the total interest for the 6 years?
A sum of Rs. 22,400 amounts to Rs. 24,250 in 6 years at the rate of simple interest. What is the rate of interest (correct to two decimal places)?
At what rate percent per annum of simple interest will a certain sum of money become double in 5 years?
X took a loan of Rs. 12500 with simple interest for as many years as the rate of interest. If the interest paid at the end of the period was Rs. 18000, then what was the rate of interest?
In how may years will a sum of Rs. 320 amount to Rs. 405 if interest is compounded at 12.5% per annum?
A sum borrowed under compound interest doubles itself in 10 years. When will it become fourfold of itself at the same rate of interest?
The price of a scooter which was bought for ₹84,000 depreciates at the rate of 10% p.a. Find its price after 2 years?