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As the question is "what is the probability of getting at least one head" the correct way to answer this is to ask what is the probability of not getting any heads and then subtract this from 1.

The probability of not getting a head in 4 flips = 0.54 (i.e. 0.5 * 0.5 * 0.5 * 0.5) = 1/16.

Therefore the probability of getting at least one head is 1 - 1/16 = 15/16.

Q: If you were to flip a coin 4 times what is the probability of getting heads at least one time?

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It is approx 0.1445

The probability of flipping a coin 3 times and getting 3 heads is 1/2

25%

6.25%

You still still have a 1:2 chance of getting heads regardless of the times you flip.

Related questions

.125

It is approx 0.1445

7/8

For 3 coin flips: 87% chance of getting heads at least once 25% chance of getting heads twice 13% chance of getting heads all three times

The probability of flipping a coin 3 times and getting 3 heads is 1/2

The probability of tossing a coin 9 times and getting at least one tail is: P(9 times, at least 1 tail) = 1 - P(9 heads) = 1 - (0.50)9 = 0.9980... ≈ 99.8%

The opposite of getting at most two heads is getting three heads. The probability of getting three heads is (1/2)^2, which is 1/8. The probability of getting at most two heads is then 1 - 1/8 which is 7/8.

The probability of getting 3 or more heads in a row, one or more times is 520/1024 = 0.508 Of these, the probability of getting exactly 3 heads in a row, exactly once is 244/1024 = 0.238

25%

6.25%

the probability of getting heads-heads-heads if you toss a coin three times is 1 out of 9.

1/2