Average Questions

What is the average of first 19 odd numbers?

What is the average of first 39 even numbers ?

A batsman makes 100 runs in the 25th match of his career. His average runs per match increases by 1.4. Find his average before the 25th match.

What is the average of first 7 multiples of 7?

Average of 11 numbers is 7. If every number is doubled, then what will be the new average of the numbers?

Nine students of a class contribute a certain sum of money. Seven of them gave Rs. 50 each and the other two gave respectively Rs. 50 and Rs. 90 more than the others. The average contribution of the class of 9 students is

What is the average of first 93 natural numbers?

The ratio of number of boys and girls in a class is 2 : 3. The average weight of boys and girls in the class is 18 kg and 21 kg respectively. What is the average weight (in kgs) of all the boys and girls together?