SOLUTION: If a fair coin is tossed 5 times, what is the probability that the coin will land face up at least twice? I attempted this problem many times and always ended up with a large

Algebra ->  Probability-and-statistics -> SOLUTION: If a fair coin is tossed 5 times, what is the probability that the coin will land face up at least twice? I attempted this problem many times and always ended up with a large       Log On


   

Question 1026939: If a fair coin is tossed 5 times, what is the probability that the coin will land face up at least twice?

I attempted this problem many times and always ended up with a large sheet of paper with many scribbles on it. I think that there are 32 total possible outcomes but I'm not sure how to calculate the probability of "at least" questions?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
"At least" twice means 2, 3, 4, or 5 times.

Alternatively, the probability is equal to 1 - P(0 or 1 heads). This way is easier in my opinion and requires few calculations.