1 dozen =_____________items.

A certain book shop has 10 dozen chemistry books, 8 dozen physics books, 10 dozen economics books. Their selling prices are Rs.80, Rs.60, Rs.40, each respectively. Using matrix algebra. Find the total value of the books in the shop.

A certain book shop has 10 dozen chemistry books, 8 dozen physics books, 10 dozen economics books. Their selling prices are Rs. 80, Rs. 60, Rs. 40 each respectively. Using matrix algebra, find the total value of the books in the shop.

A certain bookshop has 10 dozen chemistry books, 8 dozen physics books, 10 dozen economics books. Their selling prices are Rs80,Rs60 and Rs,40 each respectively. Find the total amount the bookshop will receive by selling all the books, using matrix algebra.

If the cost of dozen eggs is ₹61.80 then find the cost of an egg.

A group of 10 items has mean 6. If the mean of 4 of these items is 7.5, then the mean of the remaining items is

Mean of 100 items is 50 and their S.D. is 4. Find the sum of all the items and also the sum of the squares of the items.

In a data AM of 7 'items is 32 and for this data an item 48'is added then the result of AM=______

The mean of first three items is 14 and mean of next two items is 18. The mean of all the five terms is :