Question

how they found probability

Answer 1

for example, if we toss a coin, we donot know whether a coin would be turned to head or tails.so this type of situation is belonged to probability.

If we toss a coin then the outcome maybe heads or tails.
therefore, the total no. of outcomes are 2.
the outcome of getting tail is 1.
- the probability of getting tail = 1/2

the outcome of getting head is 1
therefore the probability of getting head is also 1/2.