anonymous
  • anonymous
We toss 3 coins 100,000 times. How many times do we expect to see "Exactly 1 Head" appearing? A. 12,500 B. 37,500 C. 3,750 D. 50,000
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
u there?????????????
anonymous
  • anonymous
Ok, so what do you think?
anonymous
  • anonymous
I have no idea i dont want to have to make a HUGE table.. >.<

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anonymous
  • anonymous
oh, no I agree.
anonymous
  • anonymous
But what if we find the probability of just getting 1 head with 3 coins
anonymous
  • anonymous
i/3rd
anonymous
  • anonymous
1/3rd sowee bout that ^^
anonymous
  • anonymous
You sure?
anonymous
  • anonymous
wait no im not :P
anonymous
  • anonymous
1/8th?
anonymous
  • anonymous
3/8 isnt it ? im
anonymous
  • anonymous
a little lost >.<
anonymous
  • anonymous
Well, I agree that the total number of outcomes for 3 coins is 8. And if only one is heads it could be the first, the second, or the third coin that lands heads. So I agree 3/8 makes sense
anonymous
  • anonymous
So what is that as a percentage probability?
anonymous
  • anonymous
isnt that 37.5%?
anonymous
  • anonymous
So then it would be B wouldnt it? :D
anonymous
  • anonymous
Yes. So doesn't that mean in 100 throws of 3 coins we should have 37.5 times just having 1 head. So in 100 thousand it should be 37.5 thousand. Yes, the answer is B
anonymous
  • anonymous
because 100,000 / 8 * 3 = 37500
anonymous
  • anonymous
correct?
anonymous
  • anonymous
That is another way to think about it yes =)
anonymous
  • anonymous
Alrighty :) Thanks!

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