The average of 27 numbers is 20.The average of first 13 numbers is 15 and that of the last 13 numbers is 18. What will be the 27th number?
In an examination, the average marks obtained by the students is 75. After correcting the quantitative mistakes, the average of 100 students is reduced ...
2 years ago, the average age of the family of 3 members is 13 years. A baby is born now; the average age of the family is same as before. Find the age o...
The average weight of 4 persons is 56 kg. The heaviest person’s weight is 30 kg more than the lightest person’s weight. If the average weight of the...
According to Ben, his age is between 30 and 34 years, while his wife thinks his age is between 32 and 36 years. His son believes his age is between 31 a...
There are 15 numbers such that average of first 12 numbers is 65 while the average of last five numbers is 70. Find the 12th number, if the ratio betwee...
The average age of 26 children and their teacher's age are 22 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?
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.
A cricketer whose bowling average is 24.85, runs per wicket, takes 5 wickets for 52 runs and thereby decreases his average by 0.85. The number of wicket...
