#ICYDK: Probability in general can be thought of as the chances of a particular event happening, say winning or loosing a game, the cliche’ example of tossing a coin and what not.
When I say chance of an event, I mean the percentage of times that event would turn out if I were to do that experiment a large number of times.
Let us consider a box that contains 13 balls, out of which 5 are Blue and 8 are Red. What will be the probability of picking a red ball? Let’s see, there are 8 red balls and a total of 13 balls, so by intuition I’d say 8/13.
The most basic mathematical definition of probability will be something like:
Probability(A) = P(A) = (Count of a likely event) / (Total number of outcomes)
According to the above formula,
P(Red ball) = 8 / (8+5) = 8/13 = 0.615 = 61.5%
P(Blue ball) = 5 / (8+5) = 5/13 = 0.384 = 38.4%
Now we’ll try to calculate it in R.
Step 1: Creating the box which contains the balls.
