The average age of a group of 10 students is 12 years. Two persons of age 15 years and 20 years, left the group and 2 persons of age 54 years and 101 ye...
Average of four numbers is 25. Sum of smallest and largest number is 54. If difference between other two numbers is 2, then find the square of second sm...
The average cost of items bought by a shopkeeper is ₹150. He purchases another item for ₹270, and the average increases by ₹10. Find the total cos...
The average salary of 400 employees were found to be Rs. 250. Later on, it was discovered that the wages of two workers were misread as 260 and 140 inst...
The total number of students in class X and Y is 72. The number of students in X is 40% more than that in Y. The average marks of students in Y are 50% ...
Find the mean of the following observations:
45, 54, 42, 56, 46, 48, 52, 50, 57, 43There is a pile of six boxes. The weight of the topmost box i.e., 6th box is one fifth of the second box, the weight of the first box is 25% ...
- In a warehouse, the ratio of the number of boxes containing books, clothes, and electronics is 7:5:3, respectively, and the average number of boxes of each...
Suresh received 100, 92, 85, 97, 90 and 88 marks in his semester exams. What is his average score?
The average marks obtained by a student in a certain number of tests is 36. His average increases by 2 when he scores 90 in his next test. Find the tota...
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