Why sample size is important in determining probability?

Sample size is important because

(1) sample size includes all possible outcomes

(2) it also includes number of favourable outcomes

for finding probability , we use formula

probability= ( number of favourable outcomes)/(total number of possible outcomes)

We can get both in sample size

it will help us to find probability

For example:

If a dice is rolled , we get sample space

sample space = { 1 , 2, 3, 4, 5, 6}

Suppose, we want to find probability of getting even number

so, favourable outcomes = {2,4,6}=3

total number of possible outcomes={1,2,3,4,5,6}=6

so, probability = 3/6 =1/2