The average price of three items of furniture is Rs. 15000. If their prices are
The average price of three items of furniture is Rs. 15000. If their prices are in the ratio 3 : 5 : 7, the…
A pupil’s marks were wrongly entered as 83 instead of 63. Due to that the aver
A pupil’s marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by half….
A school has 4 sections of chemistry in Class X having 40, 35, 45 and 42 student
A school has 4 sections of chemistry in Class X having 40, 35, 45 and 42 students. The mean marks obtained in Chemistry test…
The average marks in Science subject of a class of 20 students is 68. If the mar
The average marks in Science subject of a class of 20 students is 68. If the marks of two students were misread as 48…
The mean of 5 observations is 60, the mean of 10 observations is 30 and the mean
The mean of 5 observations is 60, the mean of 10 observations is 30 and the mean of 15 observations is 20. The mean…
Average of ten positive numbers is overline x. If each number is increased by 10
Average of ten positive numbers is overline x. If each number is increased by 10%, then overline x –
In a class there are 32 boys and 28 girls. The average age of the boys in the cl
In a class there are 32 boys and 28 girls. The average age of the boys in the class is 14 years and the…
If the arithmetic mean of seventy-five numbers us calculated, it is 35. If each
If the arithmetic mean of seventy-five numbers us calculated, it is 35. If each number is increased by 5, then mean of new numbers…
The average annual income (in Rs.) of certain agricultural workers is S and that
The average annual income (in Rs.) of certain agricultural workers is S and that of other workers is T. The number of agricultural workers…
A student obtained 60, 75 and 85 marks respectively in three monthly examination
A student obtained 60, 75 and 85 marks respectively in three monthly examinations in Physics and 95 marks in the final examination. The three…
The average mark of student in 4 subjects is 75. If the student obtained 80 mark
The average mark of student in 4 subjects is 75. If the student obtained 80 marks in the fifth subject, then the new average…
The average age of all the students of a class is 18 years. The average age of b
The average age of all the students of a class is 18 years. The average age of boys of the class is 20 years…