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Mathematics 21 Online
OpenStudy (anonymous):

HELPP I WILL GIVE A MEDAL

OpenStudy (anonymous):

OpenStudy (goldphenoix):

"No heads on the first two tosses." So what is the fist two tosses?

OpenStudy (anonymous):

idk nevr learned this

OpenStudy (goldphenoix):

Think logically. What can it be if you're flipping a coin?

OpenStudy (anonymous):

tales

OpenStudy (goldphenoix):

Alright good job. Since the first 2 tosses isn't head, then it MUST be tail. So far, you have TT which means Tail, Tail. Now that's all the info they give you. So what can you check(s)?

OpenStudy (goldphenoix):

Well, what do you think?

OpenStudy (anonymous):

tth?

OpenStudy (anonymous):

or ttt

OpenStudy (goldphenoix):

Yes! Good job. So you can check both in. Now for the other one: "A tail on both the first and the last tosses"

OpenStudy (goldphenoix):

So there is a tail on the first try, and a tail in the last try. So what can you check?

OpenStudy (anonymous):

what would be the probability

OpenStudy (anonymous):

would it be 2/8

OpenStudy (goldphenoix):

Oh, for the first one? Lets do that later. For now, just check(s). :)

OpenStudy (anonymous):

ok

OpenStudy (goldphenoix):

What do you think you check off from the second problem?

OpenStudy (anonymous):

ttt & tht

OpenStudy (goldphenoix):

Yes, good job. For the third one: "Two or more heads" What do you think you check off?

OpenStudy (anonymous):

hth thh hhh hht

OpenStudy (goldphenoix):

See. You're good at this. :)

OpenStudy (goldphenoix):

Now for the probability column. You got it right the first time. ;) Just to make sure, what did you put for the 2nd and 3rd question?

OpenStudy (anonymous):

2/8 & 4/8

OpenStudy (goldphenoix):

Correct. :)

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