The average age of a group of 20 students is 40 years. Two persons of age 44 years and 33 years, left the group and 2 persons of age 45 years and...
The weight of two persons Kishan and Krishana are in the ratio 5:7. Krishan’s weight increased by 20% and the total weight of Kishan and Krishana ...
Average of 15 observations calculated by a student was 70 but when he again went through his observations he realised that he took value of three observ...
Average of four numbers is 21. Sum of smallest and largest number is 53. If difference between other two numbers is 1, then find the square of second sm...
The average age of three children is 14 years. If their ages are in the ratio 1:2:3. Find the age of the youngest child.
Average weight of 17 nurses is 48 kg. If the weight of one more nurse is included, then average weight is increased by 1 kg. Find the weight of the newl...
A number is such that when it is multiplied by 3, it gives another number which is as much above from 240 as the original number (itself) is below 240. ...
A number is such that when it is multiplied by 5, it gives another number which is as much above from 210 as the original number (itself) is below 210. ...
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...
Average of four numbers is 18. Sum of smallest and largest number is 32. If difference between other two numbers is 2, then find the square of second sm...
