The mean of twelve positive numbers is 3. When another number is added, the mean becomes 5. Find the thirteenth number

Similar Questions

A steel ball of radius 1 cm is dropped into a cylinder of radius 2cm and height 4cm. If the cylinder...

How many students are there in the group? ...

The diagram is a polygon. Find the largest of its interior angles ...

A bucket is 12 cm in diameter at the top, 8 cm in diameter at the bottom and 4 cm deep. Calculate it...

In the diagram above, PQ is a tangent to the circle MTN at T. What is the size of ∠MTN? ...

A chord of length 6cm is drawn in a circle of radius 5cm. Find the distance of the chord from the ce...

The graph given is for the relation y = 2x2 + x - 1. Find the minimum value of y...

In the diagram, < WOX = 60o, < YOE = 50o and < OXY = 30o. What is the bearing of x from y?...

Simplify $4 - \frac{1}{2 - \sqrt{3}}$...

Determine the distance on the earth's surface between two town P (lat 60°N, Long 20°E) a...