A man bought 13 articles at Rs. 70 each, 15 at Rs. 60 each and 12 at Rs. 65 each. The average price per article is -

Eight consecutive numbers are given. If the average of the two numbers that appear in the middle is 6, then the sum of t…

The average age of 24 boys and their teacher is 15 years. When the teacher's age is excluded, the average age decreases …

A team of 8 persons joins in a shooting competition. The best marksman scored 85 points. If had scored 92 points, the av…

In a set of three numbers, the average of first two numbers is 2, the average of the last two numbers is 3, and the aver…

The average weight of 3 men, A, B and C is 84 kg. Another man D joins the group and the average now becomes 80 kg. If an…

The average of 6 observations is 45.5. If one new observation is added to the previous observations, then the new averag…

The mean of 1<sup>2</sup>, 2<sup>2</sup>, 3<sup>2</sup>, 4<sup>2</sup>, …