Question

A coin is tossed 9 times.

What is the probability of getting all heads? Express your answer as a simplified fraction or a decimal rounded to four decimal places.

Answer 1

The probability of getting one head is 1/2 since there are two sides and each side is equally likely to come up.

For multiple coin flips, each coin flip outcome is independent of the other, so you can multiply the probabilities together. The probability remains 1/2 each time so for nine coins you’d simply multiply (1/2) by itself 9 times to get (1/2)^9 which you can convert to a fraction or decimal as needed.