Fraction and Simplification, Average and Mean

Kanban Inc., earned BDT 47000 in December, thereby reducing 12-month average earning (from January to December) by BDT 2500. Find the new average earning in BDT.

In a zoo, each pigeon has 2 legs, and each rabbit has 4 legs. The head count of the two species together is 12, and the leg count is 32. How many pigeons and how many rabbits are there in the zoo?

A motorist travels to a place 150 km away at in average speed of 50 km and returns at 30 km per hour. His average speed for the whole journey in km per hour is:

A library has an average of 510 visitors on Sunday and 240 on other days. What is the average number of visitors per day in the month of June beginning with a Sunday?

If the average of the four numbers M, 2M +3, 3M - 5 and 5M + 1 is 63, what is the value of M?

The average temperature for the first 4-days of a week is 40.2º C and that of the last 4-days is 41.3° C. If the average temperature for the whole week is 40.6° C, then temperature on the fourth day is-

The average age of 12 children is 15 years. If another child comes the average age comes to 13. What is the age of the new child?

A can do a work in 15 days and B in 20 days. They work on it together for 4 days, then the fraction of the work that is left is -

An airplane flies along the four sides of a square at the speeds of 200, 400, 600 and 800 kmh. Find the average speed of the plane around the field.

The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older than him. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. What is the average age of the team?

The average of x, y, z is 6 and x - y = 4 xy = 21 what is the value of z?

In the equation: 31(m - n) - 32(m - n) + (m - n) = ?

In a shop, the cost of 5 shirts, 5 pairs of trousers and 3 hats is Tk. 710. The cost of 11 shirts, 11 pairs of trousers and 8 hats is Tk. 1590. What is the total cost of 1 shirt, 1 pair of trousers and 1 hat?

Consider that w + x = – 4, x + y = 25 and y + w = 15, Then the average of w, x, y is ____

Apu took 3/5 of the marbles kept in a box. His younger took another 3/5 of remaining marbles. Then his sister took another 3/5 of the remaining marbles. What fractions of the marbles are left in the box?

The average of 6 numbers is 25. If 3 more numbers, with an average of 22 are added to these numbers, what will be the average of the combined 9 numbers?

Let M be the median and m the mode of the following set of numbers : 10, 70, 20, 40, 70, 90. What is the average (arithmetic) mean of M and m?

Set : B contains only positive, even integers. Which of the following could be the median of set B? 

The average mark obtained by 15 students was 10 and the average mark obtained by 10 students was 15. What was the average mark obtained by all students?

The average of 6 numbers is 25. If 3 more numbers, with an average of 22 are added to these numbers, what will be the average of the combined 9 numbers?