Coin Toss Probability Calculator

Probability of
Probability of head(s) and tail(s)
Probability of coin tosses with
Toss a coin times
Monte Carlo Coin Toss trials

Calculate the probability of flipping 1 head and 2 tails

List out ways to flip 1 head and 2 tails
HTT
THT
TTH

Calculate each coin toss sequence probability:
Calculate the probability of flipping a coin toss sequence of HTT
HeadsTailsTails
The probability of each of the 3 coin tosses is 1/2, so we have:
P(HTT) =1 x 1 x 1
2 x 2 x 2

P(HTT) =1
8

P(HTT) = 0.125

Calculate the probability of flipping a coin toss sequence of THT
TailsHeadsTails
The probability of each of the 3 coin tosses is 1/2, so we have:
P(THT) =1 x 1 x 1
2 x 2 x 2

P(THT) =1
8

P(THT) = 0.125

Calculate the probability of flipping a coin toss sequence of TTH
TailsTailsHeads
The probability of each of the 3 coin tosses is 1/2, so we have:
P(TTH) =1 x 1 x 1
2 x 2 x 2

P(TTH) =1
8

P(TTH) = 0.125


Calculate final probability:
P(HTT + THT + TTH) =1 + 1 + 1
8

P(HTT + THT + TTH) =3
8

P(HTT + THT + TTH) = 0.375