Inside a vase there are 7 red balls and 7 blue balls. We choose a ball from the vase at random.
We are asked to calculate what is the probability that we take a red ball out of the vase.
Let's start by drawing the number line and marking the numbers 0 and 1.
Let's look at the data we have.
In the vase there are 7 red balls and 7 blue balls, that is, in total there are 14 balls.
We have a probability of 50 percent of getting a red ball out of the vase, i.e. half, we will either get a red ball or we will not get a red ball (i.e. we will get a blue ball).
In other words, if we want to mark the probability of getting a red ball out of the vase we will do it exactly in the middle between 0 and 1, i.e. at 0.5.
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