The average of the squares of first ten natural numbers is-

A has 50 coins of 10 paise denominations. While B has 10 coins of 50 paise denominations. C has 20 coins of 25 paise den…

The average sale of car dealership was 15 cars per week. After a promotional scheme the average sale increased to 21 car…

The average of X<sub>1</sub>, X<sub>2</sub> and X<sub>3</sub> is 14. Twice the sum o…

The average age of the mother and her six children is 12 years which is reduced by 5 years if the age of the mother is e…

A library has an average number of 510 visitors on sunday and 240 on other days. The average number of visitors per day …

There are five boxes in cargo hold. The weight of the first box is 200 kg and the weight of the second box is 20% higher…

The monthly incomes of five persons are Rs. 1132, Rs. 1140, Rs. 1144, Rs. 1136 and Rs. 1148 respectively. What is their…