Question

You flip a coin twice.What is the probability of getting heads and then getting heads?Simplify your answer and write it as a fraction or whole number.

Answer 1

Getting heads (or tails) when flipping a coin has a probability of:

`P(H)=(1)/(2)`

When we flip the coin for the second time, the head is still there, so the probabilities are the same:

`P(H)=(1)/(2)`

The probability of getting heads twice is the product of the individual (independent) events:

`P(H,H)=(1)/(2)\cdot(1)/(2)`

Calculating:

`P(H,H)=(1)/(4)`