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Mathematics 28 Online
OpenStudy (anonymous):

if one coin is flipped and then a second coin is flipped what is the probability that both coins turn up tails

OpenStudy (thesecret20111):

Ok the probability formula you will want to use is: P=number of desired outcomes/total number of outcomes

OpenStudy (thesecret20111):

Where p is the probability of the desired outcome happening.

OpenStudy (thesecret20111):

In this question the desired outcome is two tails. There is only one way this can happen.

OpenStudy (thesecret20111):

Now all we need is the total number of possible outcomes. How many are there?

OpenStudy (anonymous):

answer choices are 1/4 1/2 1/16 3/4

OpenStudy (thesecret20111):

Yes I already know the answer.. I'm trying to help you to understand it.

OpenStudy (thesecret20111):

So how many total different outcomes are there for the two coins?

OpenStudy (anonymous):

lol -____________________- can you just tell me ?

OpenStudy (anonymous):

jdag, this forum is for teaching people HOW to think, not WHAT to think.

OpenStudy (thesecret20111):

This site isn't for lazy people who want their homework done for them.. It's for people who are struggling and need help understanding the concepts..

OpenStudy (thesecret20111):

What I'm asking isn't hard.. Just think about all the possible outcomes of rolling 2 coins.. Here are the first two: Tails and Tails Tails and Heads

OpenStudy (anonymous):

4

OpenStudy (thesecret20111):

Good. This is because there are only the following outcomes possible. There's: Tails and Tails Tails and Heads Heads and Tails Heads and Heads

OpenStudy (thesecret20111):

This means the probability = 1/4

OpenStudy (anonymous):

ooooooooooo i get it thanks!

OpenStudy (thesecret20111):

No problem :)

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