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avatar+30 

A die is rolled 9 times. Find the probability of rolling exactly 1 six.

 Apr 20, 2019
 #1
avatar+103148 
+2

P ( one six)  =  C(9,1) ( 1/6) ( 5/6)^8  ≈ .349  =  34.9%

 

cool cool cool

 Apr 20, 2019
 #2
avatar+30 
0

I tried to input that into my calculator to get a decimal in the fourth place as required by my answer, but I get 9, why is that?

treeko  Apr 20, 2019
 #3
avatar+18965 
+2

.348852   I do not know why you get 9...sorry  cheeky

 Apr 20, 2019
 #5
avatar+103148 
+1

THX, EP....

 

cool cool cool

CPhill  Apr 20, 2019
 #4
avatar+103148 
+2

Try this

 

C(9,1)  = 9

 

So  we have

 

9 (1/6)  =  9/6  = 3/2  = 1.5

 

So....we really have

 

1.5 * (5/6)^8  ≈   .3488

 

cool cool cool

 Apr 20, 2019
 #6
avatar+128 
-1

Expression: 1/6*9*(5/6^8).

 

The expression above is to be evaluated to find the probability of rolling exactly one die.

 

Type it in to your calculator and you get a approximate total of ~34.89%.

 

There is a ~34.89% chance of rolling exactly one six when rolled 9 times.

 

~~Hypoteniusance

 Apr 21, 2019

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