Experimental Probability

So we’re going to base our experimental probability on this video HERE

So we have a spinner:


The way I’m doing this problem is I am taking a spinner like this at home and I’m spinning it 10 times. I am putting a tally next to the number to see how many times I got the result.

1= III

2= I


4= II

So I will write the probabilities with the denominator as 10 and the numerator as what the result of the number is.

1 = 3/10

2= 1/10

3= 4/10 = 2/5

4= 2/10 = 1/5

So the probability of getting a 4 is 1/5.

If I wanted to know the probability of getting anything under a 3 would be

3/10 + 1/10 = 4/10 = 2/5


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