What is the average of the squares of the first 19 natural numbers? 

The average weight of 12 parcels is 1.8 kg. Addition of another new parcel reduces the average weight by 50 g. What is the weight of the new parcel?

In an exam of 100 marks, the average marks of a class of 40 students are 76. If the top 3 scorers of the class leave, the average score falls “down by 1. If the other two toppers except “the highest topper scored not more than 85. “then what is the minimum score the topper can score?

The average of four consecutive odd numbers is 36. What is the smallest of these numbers?

The average salary per head of all the workers of JK Campus is ₹ 60. The average salary of 12 center heads is ₹ 400 and of the rest is ₹ 56. The total number of workers in JK Campus is 

A car reaches its destination in time when moving with an average speed of 45 km/hr. But when it is moving at 30 km/hr, it is late by 10 minutes. Find the total distance of the journey?

The average of a,b,c is 20 and that of b,c,d is 25, if d=30, then the value of a is-

If (a + b): (b + c): (c + a) = 5: 6: 9 and a + b + c = 10. What is the value of c?