# Thread: Probability Word Problem! #2

1. ## Probability Word Problem! #2

I have another probability word problem, please?

What is the probability that when 3 coins are tossed
that at least 2 will land tails up?

Thank you very much!

2. Originally Posted by glue'd'n'math
I have another probability word problem, please?

What is the probability that when 3 coins are tossed
that at least 2 will land tails up?

Thank you very much!
Write out all the possible combinations of heads and tails (there are 2^3 = 8):

H H H
H H T
H T H
H T T
T H H
T H T
T T H
T T T

How many of these have at least 2 tails ....?

Pr = (number of favourable outcomes)/(total number of outcomes)