Frustum of Cone:
The frustum of a cone is a three-dimensional figure that is formed when a smaller cone is removed from a larger cone, leaving a truncated cone shape. It is also known as a truncated cone. The frustum has two circular bases and a curved lateral surface connecting them.

Properties of a Frustum of Cone:
- The frustum of a cone has two bases, which are circles. The larger base is called the base of the frustum, and the smaller base is called the top of the frustum.
- The frustum also has a curved surface connecting the two bases, which is called the lateral surface.
- The height of the frustum is the perpendicular distance between the base and the top of the frustum.
- The slant height of the frustum is the distance between any point on the top of the frustum and the base of the frustum along the curved surface.

Volume of a Frustum of Cone:
The volume of a frustum of cone can be calculated using the formula:

V = 1/3πh(R^2 + r^2 + Rr)

Where:
- V is the volume of the frustum
- π is a constant approximately equal to 3.14
- h is the height of the frustum
- R and r are the radii of the base and top of the frustum, respectively.

Surface Area of a Frustum of Cone:
The surface area of a frustum of cone can be calculated using the formula:

A = π(R + r)l + π(R^2 + r^2)

Where:
- A is the surface area of the frustum
- π is a constant approximately equal to 3.14
- R and r are the radii of the base and top of the frustum, respectively
- l is the slant height of the frustum.

Fun Video: Introduction to Probability:
Probability is a branch of mathematics that deals with the likelihood or chance of an event occurring. It is used to quantify uncertainty and make predictions based on available information.

In an introduction to probability video, you can expect to learn the following key concepts:

1. Definition of Probability:
- Probability is defined as the measure of the likelihood of an event occurring.
- It is represented by a number between 0 and 1, where 0 represents impossibility and 1 represents certainty.

2. Sample Space and Events:
- The sample space is the set of all possible outcomes of an experiment.
- An event is a subset of the sample space, which consists of one or more outcomes.

3. Calculating Probability:
- Probability can be calculated by dividing the number of favorable outcomes by the total number of possible outcomes.
- The probability of an event can range from 0 to 1, where 0 represents impossibility and 1 represents certainty.

4. Types of Probability:
- There are three types of probability: theoretical, experimental, and subjective.
- Theoretical probability is based on mathematical calculations and assumptions.
- Experimental probability is based on conducting experiments and collecting data.
- Subjective probability is based on personal judgment and experience.

5. Probability Rules:
- Addition Rule: The probability of the union of two events is the sum of their individual