## E(X²) for a discrete random variable

I have just added this video to fill a gap in the tutorials on discrete random variable

I have just added this video to fill a gap in the tutorials on discrete random variable

This video offers a supplementary exercise for anyone wanting more practice in finding an angle of a right angled triangle using trigonometry.

Remake of an earlier video due to an arithmetic error. I could not add up, Oops! Here is the correct version for Edexcel S1 January 2008 Question 2(c)

Have you ever wondered how to calculate a 10% tip in a restaurant? There is no need to be a maths genius. Just take a look at the short tutorial video, it's very easy, no more embarrassing moments.

I have put together some mechanics tips which I hope you find useful. Mechanics is a subject that requires a lot of diagrams. Don't get lazy and cut corners. Learn the standard diagrams for a given topic so that you can draw them without having to think for too long. Use standard letters to simplify [...]

I have spent over thirty years teaching mathematics to A level and during this time I have never found any quick fixes or instant recipes for passing A/S and A Level mathematics. It is a subject which can be very demanding and tests ones ability to persevere. Meet these demands and the subject can become [...]

The following list is by no means complete but these are some points to bear in mind when answering GCSE maths examination questions. GCSE Maths Exam Tips - How to avoid common mistakes Always read the question I know this may sound obvious but it always surprises me how often students don't read a question. [...]

Maths A-Level maths is normally studied after doing GCSE maths in UK schools and colleges. Maths A-level is generally regarded as a two year course which is broken up into various modules. The common modules are Core Maths, Mechanics, Statistics and Decision Maths. Some of the popular examination boards that offer maths at A-level are [...]

Ok so you want to study maths at university. Why do it? To take up teaching maybe? This has been very rewarding for me over the years. I went to university and did a degree in maths and then went on to do a Post Graduate Certificate in Education (P.G.C.E.) which specialised in teaching maths. [...]

For many students, taking exams can be a very stressful and anxious time. It can also be very stressful for parents to. The right preparation before the exams is so important. Often maths revision courses can prove very helpful. There are numerous maths revision courses that take place up and down the country in [...]

What can you do? Take up teaching maths maybe. This has been very rewarding for me over the years. I went to university and did a degree in maths and then went on to do a Post Graduate Certificate in Education (P.G.C.E.) which specialised in teaching maths. I still teach as you can see from [...]