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What is the probability that the same number will be facing up on each of three standard six-sided dice that are tossed simultaneously? Express your answer as a common fraction.

 Jul 25, 2020
 #1
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First die =any number =6/6

2nd die - The probability that it is different from the first die = 5/6

3rd die -  The probability that it is different from the first two= 4/6

 

Then, the probability that ALL three are different from each other =6/6  x  5/6  x  4/6 =120 / 216

Then, the probability that ALL three show the same number  = 1 - 120 / 216 = 96 / 216 = 4 / 9

 Jul 25, 2020
 #2
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216 possible rolls

6 rolls will fit the criteria   666 555 444 333 222 111

 

6 /216 = 1/36 chance

 Jul 25, 2020
edited by ElectricPavlov  Jul 25, 2020
 #3
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(1)  The first die can be anything. 

(2)  The odds of the second die being the same as the first  =  1/6 

(3)  The odds of the third      die being the same as the first  =  1/6 

 

                                                                      1        1          1   

The odds of both (2) and (3) happening  =   ––  x  ––   =   —–  

                                                                       6       6          36  

.

 Jul 25, 2020
 #4
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There is a 1/35 chance 

 Jul 25, 2020
 #5
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What is this, "A for Effort" day?  The answer is wrong and somebody gave it a "plus heart"?

Guest Jul 26, 2020

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