A factory buys 7 machines. 2 Machine A, 2 Machine B and rest Machine C. Prices of the machines are Rs 95000, Rs 75000 and Rs 43000 respectively. Calculate the average cost of these machines?

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 four consecutive even numbers is 9. Find the largest number. 

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?

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

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.

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?