WebE (X) = np Var (X) = npq Example In the above example, what is the expected number of heads thrown? E (X) = np Now in the above example, p = probability of throwing a head = ½ . n = number of throws = 10 Hence expected number of heads = 5. This is what you would expect: if you throw a coin 10 times you would expect 5 heads and 5 tails on average WebExample 1. We can calculate the gradient of the line above by selecting two coordinate points that the straight line passes through. \ [m = \frac { { {y_2} - {y_1}}} { { {x_2} - {x_1}}} …
Maths Genie • Learn GCSE Maths for Free
WebA chemical formula is used to represent an element or compound in balanced chemical equations. Carbon dioxide units contain one carbon atom and two oxygen atoms Sometimes you see more complex formulae such as Na 2 SO 4 and FeOH 3. If you are searching for Physics Formulas Bbc Bitesizeyou've reached the right location. WebFormulae and equations Chemists use symbols and formulae to represent elements, ions and compounds. Word equations and balanced chemical equations model the changes that happen in chemical... has dak prescott ever beat tom brady
What is an equation? - BBC Bitesize
WebThere are several basic facts and equations connected with straight lines that you need to know by heart. Distance formula The distance between two points, \ ( ( {x_1}, {y_1})\) and \ ( (... WebFree online GCSE video tutorials, notes, exam style questions, worksheets, answers for all topics in Foundation and Higher GCSE. The content is suitable for the Edexcel, OCR and AQA exam boards. WebEquations. When you are solving an equation, you have to move everything except the missing number to one side. Anything you do to … has dana air started flying