When the average age of a husband and wife and their son was 44 years, the son got married and a child was born just one year after their marriage. When...
Average of four numbers is 25. Sum of smallest and largest number is 54. If difference between other two numbers is 2, then find the square of second sm...
The average cost price of 21 pens (having equal cost price) decreased by Rs.3, when one of the pen is replaced by a new pen having cost price of Rs.55. ...
The average of three numbers is 21. The first number is double the second, and the third number is double the first. Calculate the sum of the first and...
Average weight of Shikhar, Rohit and Virat is 72 kg. Hardik joins the group and the average now becomes 65 kg. If Dhoni whose weight is 8 kg more than ...
The average of 4, 6, 8, 12 and x is 7 and the average of x, 9, 13, 15 and y is 9. What is the value of 2x – 3y?
The average age of P, Q, and R is 22 years. Two years ago, the sum of the ages of P and Q was 5 years less than the age of R. Find the present age of R.
The meaning of 12 observations is 15. One more observation is included, and the new mean becomes 17. The 13th observation is.
The average temperature of Monday, Tuesday, Wednesday and Thursday is 50°. The average temperature for Tuesday, Wednesday, Thursday and Friday is 60°....
If the average of s number is r⁴ and the average r number is s⁴, then find the average of all r+ s numbers
