Question

There is a 50% chance a coin lands on heads and a 50% chance the coin lands on tails what is the probability that the coin lands on heads three times in a row ?

Answer 1

Since the probability of the coin landing leads is 1/2, simply cube 1/2 to arrive at your answer: 1/8.

You cube 1/2 because you must land heads three times in a row and each flip is independent from other flips.

Answer 2

P(HHH) = 1/8

Explanation:

The probability of getting heads is 1/2

P(H) = 1/2

We multiply the probabilities together because the events are independent.

P(HHH) = 1/2 * 1/2 * 1/2

= 1/8