Probability/TextOnly

In our lives, we encounter different uncertain events, for example when you play a board game, you roll a dice, then it is possible for the dice to get 1-6. To describe how likely something happen, we can use probability. In this app, you will learn how to calculate the possibility of getting your favourable result and whether it is worth to participate in events involved in probability by calculating expected value.

From the above formula, we've learnt how to calculate the probability of an event. Let's look at some life examples on calculating probability!

A dice is possible to have 6 outcomes, which are 1,2,3,4,5,6, so the number of possible outcomes is 6. This question asks for 1 favourable outcome, which is "4", so the probability is 1/6.

In the examples, we may noticed that the probability must lie between 0 and 1. If it is 0, the event is impossible to happen while if it is 1, the event is certain to happen. We can know what the number means using a probability line.

Formula: (Event 1 probi)(Event 1 price)+(Event 2 probi)(Event 2 price)+...

You've learnt about probability and expected value! Let's check your knowledge through a quiz and play a fun game. I believe you can get high points and win easily using your knowledge!