The average age of 30 students is 9 years. If the age of their teacher is includ
The average age of 30 students is 9 years. If the age of their teacher is included, the average age becomes 10 years. The…
The average of nine number is 50. The average of first five numbers is 54 and th
The average of nine number is 50. The average of first five numbers is 54 and that of the last three numbers is 52….
The average age of 20 boys in a class is 12 years. 5 new boys are admitted to th
The average age of 20 boys in a class is 12 years. 5 new boys are admitted to the class whose average age is…
From a class of 42 boys, a boy aged 10 years goes away and in his place, a new b
From a class of 42 boys, a boy aged 10 years goes away and in his place, a new boy is admitted. If on…
Average weight of 25 students of a class is 50 kg. If the weight of the class te
Average weight of 25 students of a class is 50 kg. If the weight of the class teacher is included , the average is…
The average age of 24 boys and their teacher is 15 years. When the teacher’s age
The average age of 24 boys and their teacher is 15 years. When the teacher’s age is excluded, the average age decreases by 1…
The mean of 100 items was 46. Later on it was discovered that an item 16 was mis
The mean of 100 items was 46. Later on it was discovered that an item 16 was misread as 61 and another item 43…
The average age of four boys A, B, C and D is 5 years and the average age A, B,
The average age of four boys A, B, C and D is 5 years and the average age A, B, D, E is 6…
The average of four consecutive even numbers is 15. The 2 nd highest number is :
The average of four consecutive even numbers is 15. The 2 nd highest number is :
A librarian purchased 50 storybooks for his library. But he saw that he could ge
A librarian purchased 50 storybooks for his library. But he saw that he could get 14 books more by spending Rs. 76 more but…
The average of runs scored by a cricketer in his 99 innings is 99. How many runs
The average of runs scored by a cricketer in his 99 innings is 99. How many runs will he have to score to his…
A student finds the average of 10, 2 digits numbers. If the digits of one of the
A student finds the average of 10, 2 digits numbers. If the digits of one of the numbers interchanged, the average increases by 3.6….