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Pulsified333
 one year ago
Someone help I will give medal
Question involving the rolling of two fair dice.
What is the probability of one of the dice showing 3 or the sum being at least 8?
Pulsified333
 one year ago
Someone help I will give medal Question involving the rolling of two fair dice. What is the probability of one of the dice showing 3 or the sum being at least 8?

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Well do you know how to compute probability?

Pulsified333
 one year ago
Best ResponseYou've already chosen the best response.0yes I do, I thought the answer was 16/36 but it was wrong

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So the probability of rolling 3 is equal on /both/ of them so we just leave that probability as 1/6th, not 1/12th. Does that help?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Huh? On a fair dice there's a 1 in six chance of rolling a 3.

Pulsified333
 one year ago
Best ResponseYou've already chosen the best response.0yes but can't you roll a 3 on lets say die 1 or die 2?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yes, but that's 2/12 chance, which simplifies down to 1/6.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Actually, 16/36 can be simplified. Maybe the answer needs to be simplified. What format is the test?

Pulsified333
 one year ago
Best ResponseYou've already chosen the best response.0it simplifies it for you

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So we've got 1/6th. Then we need to work out the chance of rolling a sum of of over eight and add it to 1/6th.

Pulsified333
 one year ago
Best ResponseYou've already chosen the best response.0would it be over 36?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0IDK XD I'll work it out.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So how many combinations are there that equal above 8?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So there is a 5/36 (yeah, it is 36) chance of getting +8. So find a common denominator between 1/6th and 5/36ths and add them together.

Pulsified333
 one year ago
Best ResponseYou've already chosen the best response.0its the sum of at least 8

Pulsified333
 one year ago
Best ResponseYou've already chosen the best response.0which equals 15/36

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ok. So still, multiply 'till you've got a common denominator + add them together.

Pulsified333
 one year ago
Best ResponseYou've already chosen the best response.0wouldn't the probability of getting a 3 on one die be 10/36

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I think the probability of 1 showing a 3 is 11/36. http://www.sms.rcs.k12.tn.us/TEACHERS/flaniganj/TEST/chapter_9_files/i0100000.jpg

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Well 36/6 = 6 so it's 6/36

Pulsified333
 one year ago
Best ResponseYou've already chosen the best response.0where is the 6 coming from?

Pulsified333
 one year ago
Best ResponseYou've already chosen the best response.0would the answer be 25/36

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0You can get a 3 six different way on the first die, and 6 different ways on the second die. But two of those is (3, 3) so you subtract 1 to get 11/36 ways. 11/36 + 15/13 = 26/36

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0* 11/36 + 15/36 = 26/36

Pulsified333
 one year ago
Best ResponseYou've already chosen the best response.0the answer is still wrong

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Well you're multiplying both sides of the fraction to give it 36 as a denominator, and you need to times 6 by 6 to get to 36, so so you also multiply 1 by six to get from 1/6 to 6/36, which you can add to 15/36.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Which by my admittedly thirteenyearold brain is 21/36.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0did you try the 25/36 you came up with? I'm guessing they want you to exclude the double roll.

Pulsified333
 one year ago
Best ResponseYou've already chosen the best response.0yeah probably because it says one 3 not 2

Pulsified333
 one year ago
Best ResponseYou've already chosen the best response.0i didn't try it yet. I only have 2 attempts left

Pulsified333
 one year ago
Best ResponseYou've already chosen the best response.0do you think 25/36 would be the right answer if its not including the double roll

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yeah, not including it, it's 25/36. including it, it's 26/36 or 13/18.

Pulsified333
 one year ago
Best ResponseYou've already chosen the best response.0no its not it either

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0red = one 3 blue = sum at least 8dw:1443039212787:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0there are 4 double counts. so they have to be subtracted. 10/36 + 15/36  4/36 = 21/36
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