In a class, there are 40 boys and their average age is 16 years. One boy, aged 1
In a class, there are 40 boys and their average age is 16 years. One boy, aged 17 years, leaving the class and another…
The average salary, per head, of all the workers of an institution is Rs. 60. Th
The average salary, per head, of all the workers of an institution is Rs. 60. The average salary of 12 officers is Rs. 400;…
If average of 20 observations x 1 , x 2 , . . . . . x 20 is y, then the average
If average of 20 observations x 1 , x 2 , . . . . . x 20 is y, then the average of…
The average of the three numbers x, y and z is 45. x is greater than the average
The average of the three numbers x, y and z is 45. x is greater than the average of y and z by 9….
The average of 5 consecutive integers starting with ‘m’ is n. What is the averag
The average of 5 consecutive integers starting with ‘m’ is n. What is the average of 6 consecutive integers starting with (m + 2)?
4 boys and 3 girls spent Rs. 120 on an average, of which boys spent Rs. 150 on t
4 boys and 3 girls spent Rs. 120 on an average, of which boys spent Rs. 150 on the average. The the average amount…
The average marks of 14 students was 71. It was later found that the marks of on
The average marks of 14 students was 71. It was later found that the marks of one of the student has been wrongly entered…
If the difference between the average of x, y and y, z is 12, then the differenc
If the difference between the average of x, y and y, z is 12, then the difference between x and z is :
In a 20 over match, the required run rate to win is 7.2. If the run rate is 6 at
In a 20 over match, the required run rate to win is 7.2. If the run rate is 6 at the end of the…
In an examination average marks obtained by the girls of a class is 85 and the a
In an examination average marks obtained by the girls of a class is 85 and the average marks obtained by the boys of the…
The average age of 10 children is 9 years 9 months. The average of 9 children is
The average age of 10 children is 9 years 9 months. The average of 9 children is 8 years 11 months. What is the…
The average age of 40 students of a class is 15 years. When 10 new students are
The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average is increased by 0.2…