Here is the question:
And here is the answer:
I understand till "There are 20 ways" but then, P(event does not occur), where did the (1/6)^3 come from??
Please help as fast as possible! Thank you.
+118690 It is more confusing becasue some of what is written is WRONG.
There are 20 ways that this can happen
and there are 6*6*6 = 216 different possible rolls
6 choices for the 1st roll, 6 for the second, 6 for the third = 6*6*6 different outcomes (order definitely counts)
P(that it WILL happen ) = \(\frac{20}{216}\)
P( that it DOES NOT happen ) = \(1-\frac{20}{216}\)
P( that it WILL NOT happen twice in a row ) = \((1-\frac{20}{216})^2\)
Does that make more sense?
