The mean of 50 observations was 36. It was found later that an observation 48 wa
The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected new mean…
The average of 18 observations was calculated and it was 124. Later on it was di
The average of 18 observations was calculated and it was 124. Later on it was discovered that two observations 46 and 82 were incorrect….
If the arithmetic mean of seventy five numbers is calculated, it is 35. If each
If the arithmetic mean of seventy five numbers is calculated, it is 35. If each number is increased by 5, then mean of new…
A person travels from x to y at a speed of 40Km/h and returns by increasing his
A person travels from x to y at a speed of 40Km/h and returns by increasing his speed 50%. What is his average speed…
In the first 10 overs of a cricket game, the run rate was only 3.2. What should
In the first 10 overs of a cricket game, the run rate was only 3.2. What should be the rate in the remaining 40…
The mean marks of 30 students in a class is 58.5. Later on it was found that 75
The mean marks of 30 students in a class is 58.5. Later on it was found that 75 was wrongly recorded as 57. Find…
The average of runs of a cricket player of 10 innings was 32. How many runs must
The average of runs of a cricket player of 10 innings was 32. How many runs must he make in his next innings so…
The average of women and child workers in a factory was 15%yr. The average age o
The average of women and child workers in a factory was 15%yr. The average age of all the 16 children was 8yr and average…
The average of 35 students in a class is 16 years. The average age of 21 student
The average of 35 students in a class is 16 years. The average age of 21 students is 14. What is the average age…
The average age of students of a class is 15.8 years. The average age of boys in
The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that…
The average of five numbers is 27. If one number is excluded, the average become
The average of five numbers is 27. If one number is excluded, the average becomes 25. The excluded number is__________?
In an examination a pupil’s average marks were 63 per paper. If he had obtaine
In an examination a pupil’s average marks were 63 per paper. If he had obtained 20 more marks for his Geography paper and 2…