Answer
Step-by-step explanation
We are asked to find the probability of NOT getting three Tails.
This probability will be
1 - (Probability of getting 3 Tails from the three coins)
Probability of getting a Tail from one coin = ½
(Since there are only two possible outcomes, heads or tails)
Probability of getting 3 Tails from three coins in a flip of the 3 coins
= ½ × ½ × ½
= (1/8)
We can simply multiply because the probabilities are mutually exclusive from one another, that is, the chances of getting Tails from one of the coins doesn't depend on the other coins.
Probability of not getting 3 Tail