Using a calculator, plug numbers into the formula: nCk/2^n
4C3/2^4 = 4/16 = 1/4
Pascal's triangle can be used, if you are familiar with that (makes things much easier for a .5 probability scenario. See related link
50%
The probability is 1/4
50/50
Coins do not have numbers, there is only the probability of heads or tails.
The answer depends on how many coins were tossed.
50%
The probability is 1/4
1/64
50/50
The probability is 0.5The probability is 0.5The probability is 0.5The probability is 0.5
The probability of tossing a coin twice and getting tails both times is 1 in 4, or 25%. If you have already tossed a coin and had it land on tails, the probability that it will land on tails again the next time you toss it is 50%.
It is 0.25
Coins do not have numbers, there is only the probability of heads or tails.
The probability of getting two tails in the first two is 1/4. And it does not matter how many more times the coins are tossed after the first two tosses.
25% or 0.25 Probability of one tail is 0.50. Since two tails are independent events, the probability is 0.5 x 0.5 = 0.25
The answer depends on how many coins were tossed.
The probability to get tails once is 1/2 (for a fair coin) The probability to get tails twice = the probability to get it once x the probability to get it a second time The probability to get tails 4 times in a row is (1/2)4=1/16 The probability to get tails n times in a row is (1/2)n=1/2n The same thing is also true for heads (same probability: 1/2 each time)