SOLUTION: If Three Fair coins are tossed, finds the probability of each of the folllowing numbers of heads. 6. at least 1

Question 44640This question is from textbook Mathe,atical Ideas
: If Three Fair coins are tossed, finds the probability of each of the folllowing numbers of heads.
6. at least 1 This question is from textbook Mathe,atical Ideas

Answer by longjonsilver(2297) (Show Source): You can put this solution on YOUR website!
all possible outcomes on 3 coins are:
3 heads: HHH --> 1 outcome
2 heads: HHT or HTH or THH --> 3 outcomes
1 head: HTT or THT or TTH --> 3 outcomes
0 heads: TTT --> 1 outcome

Question asks for at least 1 head which is any of the top 7 outcomes.

Now each of these outcomes has a probability of (1/2)*(1/2)*(1/2) --> 1/8 since we have 3 coins flipped at a time.

So the answer is 7/8. In other words, it is highly likely to get at least one head when flipping 3 coins. The only time you would not is by getting 3 tails.

Jon
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