There are 50 students in a class. Their average weight is 45 kg. When one studen
There are 50 students in a class. Their average weight is 45 kg. When one student leaves the class the average weight reduces by…
In a family of 5 members, the average age at present is 33 years. The youngest m
In a family of 5 members, the average age at present is 33 years. The youngest member is 9 years old. The average age…
Out of nine persons, 8 persons spent Rs. 30 each for their meals. The ninth one
Out of nine persons, 8 persons spent Rs. 30 each for their meals. The ninth one spent Rs. 20 more than the average expenditure…
A cricketer whose bowling average is 24.85 runs per wickets, takes 5 wickets for
A cricketer whose bowling average is 24.85 runs per wickets, takes 5 wickets for 52 runs in next inning and thereby decreases his average…
A man had 7 children. When their average age was 12 years, a child aged 6 years
A man had 7 children. When their average age was 12 years, a child aged 6 years died. Then average age of remaining six…
The average of n numbers x 1, x 2…..x n is overline x.Then the value of sumlim
The average of n numbers x 1, x 2…..x n is overline x.Then the value of sumlimits_i, =,1^n (x_i – overline x) is equal…
In a class, the average score of girls in an examination is 73 and that of boys
In a class, the average score of girls in an examination is 73 and that of boys is 71. The average score for the…
A library has an average number of 510 visitors on sunday and 240 on other days.
A library has an average number of 510 visitors on sunday and 240 on other days. The average number of visitors per day in…
If the average of 6 consecutive even number is 25, the difference between the la
If the average of 6 consecutive even number is 25, the difference between the largest and the smallest number is :
There are two groups A and B of a class, consisting of 42 and 28 students respec
There are two groups A and B of a class, consisting of 42 and 28 students respectively. If the average weight of group A…
The sum of three consecutive even numbers is 28 more than the average of these t
The sum of three consecutive even numbers is 28 more than the average of these three number. Then the smallest of these number is…
The average of x numbers is y 2 and the average of y numbers is x 2 . So, the av
The average of x numbers is y 2 and the average of y numbers is x 2 . So, the average of all the…