After replacing an old member by a new member, it was found that the average age of five members of a club is the same a…

19 people went to a hotel for combine dinner party 13 of them spent Rs. 79 each on their dinner and rest spent 4 more th…

The arithmetic mean of the following numbers : 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6 and 7, 7, 7…

In Arun's opinion, his weight is greater than 65 kg but less than 72 kg. His brother doest not agree with Arun and he th…

If the mean of 4 observations is 20, when a constant 'c' is added to each observation, the mean becomes 22. The value of…

My Scooty gives an average of 40 kmpl of petrol. But after recent filling at the new petrol pump, its average dropped to…

The average of 50 numbers is 30. If two numbers, 35 and 40 are discarded, then the average of the remaining numbers is n…

The average price of 10 books is Rs.12 while the average price of 8 of these books is Rs.11.75. Of the remaining two boo…