Fan and medal! This is the last of these questions. A number cube with the numbers 1 through 6 is rolled. Find the given probability. (complement of 4)

Question

Fan and medal! This is the last of these questions.  A number cube with the numbers 1 through 6 is rolled.  Find the given probability. (complement of 4)

luffingsails · Answer

So, the complement is the same as saying what are the events that are not a roll of 4.

anonymous · Answer

Okay

luffingsails · Answer

So, what are the events you can roll that are not a 4, and how many of them are there?

anonymous · Answer

You mean what is the numbers on the cube I can roll that aren't a 4?

luffingsails · Answer

Right.

anonymous · Answer

1,2,3,5,6

luffingsails · Answer

Exactly. So, now you have that number, just divide by the total number of faces for your final answer.

luffingsails · Answer

Another way of looking at is 

the complement of P(A) = 1 - P(A)

anonymous · Answer

4 divided by 6 = 0.6666666666 *repeating* Is that right?

luffingsails · Answer

5 faces right? All faces but  the number 4.

So, 5/6... I would just leave it as a fraction like that unless you are told to do otherwise.

anonymous · Answer

Oh Ok Thanks

luffingsails · Answer

You're welcome.