The average of x occurring 5 times and y occurring 7 times is 37. Also, the average of x occurring 7 times and y occurring 5 times is 35. The value of y is:

The average of twenty-five numbers is 54. The average of the first 13 numbers and that of the last 13 numbers is 52.8 and 62.2, respectively. If the 13th number is excluded, then what is the average of the remaining numbers (correct to one decimal place)?

Answer the following questions

There are three numbers in such a way that the average of the first and second numbers is 68 more than the average of the second and third number. Find the difference between first and the third number.

Six tables and twelve chairs were bought for ₹ 7,800. If the average price of a table is ₹750, then the average price of a chair would be

A supermarket has sales of ₹1,48,500, ₹2,00,000, ₹1,64,000, ₹1,88,600 and ₹2,40,400 in 5 consecutive months. How much sales should the supermarket have in the 6th month so that the average sales for these 6 months become ₹1,88,300?

There are two groups A and B of a class, consisting of 42 and 28 students respectively. If the average weight of group A is 25 kg and that of group B is 40 kg, find the average weight of the whole class. 

The average of 10 numbers is 14. If each number is multiplied by 6 then what will be the new average?

The mean of five numbers is 18. If one number is excluded, their mean is 16. The excluded number is: