The probability of getting a heads on the first flip is 1/2.
Similarly, the probability on each subsequent flip is 1/2, since they are independent events.
The probability of several independent events happening together is the product of their individual probabilities.
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The probability of heads is 0.5 each time.The probability of four times is (0.5 x 0.5 x 0.5 x 0.5) = 0.0625 = 1/16 = 6.25% .
We have no way of knowing the probability of any given person flipping any given coin at any given time. But for any two flips of an honest coin, the probability that both are tails is 25% . (1/4, or 3 to 1 against)
1:6 * * * * * No. It is 10/32 = 5/16
The odds of flipping a coin and having it come up heads three times in a row is (1/2)*(1/2)*(1/2)=(1/8) or 12.5% ■
None, since that would imply that in 18 cases the coin did not show heads or tails!