Example1) 1 unbiased coins are tossed. What is the probability of getting exactly 1 Head
Solution:
Total number of outcomes possible when a coin is tossed`=2`
`:.n(S)=2`
Here `S` = {H, T}
Let `E` = event of getting exactly `1` head
`:.` `E` = {H}
`:.n(E) = 1`
`:.P(E)=(n(E))/(n(S))=1/2`
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