Question

If you flip 3 coins, what is the probability of getting three Heads? P(getting 3 Heads)

Answer 1

0.125

Explanation:

Possible outcomes are HHH, THH, HTH, HHT, TTH, THT, HTT, TTT.

The number of cases in which you get exactly 3 heads is just 1.

Thus, the probability of getting 3 heads = 1/8 = 0.125

Hence, if you flip a coin 3 times the probability of getting 1 heads is 0.125

Answer 2

Notice that flipping the three coins are independent evet, and as such the probability of the combiend event of getting 3 heads is the product of probability of getting heads in the three occasions.

Since the probability of getting heads in one toss is 1/2, then the combined probability is:

1/2 * 1/2 * 1/2 = 1/8