Finite: Probability

Question

A coin is tossed three times. What is the probability that a "heads" came up at least two times?

Answer 1

Hello Nathan,

List all the possibilities (sample space) for 3 coin flips. I'll start it.

HHH

HHT

HTH

...

Then see how many results on the list have at least 2 heads out of the total. That will give you the probability of at least 2 heads.