Outcomes and Events Examples

If you flip a fair coin, what is the probability of getting heads?

The probability is the number of favorable outcomes over the number of possible outcomes, or

.

Since there's only one way a coin can come up heads, and two possible outcomes from any coin flip (heads or tails), the probability of getting heads on a fair coin flip is .

The only exception is if you're flipping with Cerberus to see if you can get out of entering Hades; his coin has three heads and one tail.

A drawer contains 4 blue socks and 6 red socks. If you pull out a sock at random, what is the probability of

1. getting a red sock?
2. getting a blue sock?
3. getting either a red or blue sock?
4. it having at least one hole in the toe?

1.

2.

3.

4. Depends on how long since you've been to Target.