ACT Math: Pre-Algebra: Drill 6, Problem 3. What is the probability of rolling two dice and getting a one on each?
|Foreign Language||Arabic Subtitled|
|Pre-Algebra||Elementary counting technique and simple probability|
|Product Type||ACT Math|
|Statistics and Probability||Probability|
So we are in Vegas, baby and we're rollin' for mama's new pair of shoes.
The key issue here that often eludes people is that the dice rolls are independent events.
That is, we could roll a 4 eight times in a row and our odds of rolling a 4 on the NEXT
roll are... still 1 in 6.
So in this case, the odds of a 1 are 1 in 6; then on the second roll, the odds are still
a 1 in 6.
When we have successive independent events, we just multiply them.
So we multiply 1 sixth times 1 sixth and get 1 thirty-sixth -- that's the odds of a
1 and a 1 on consecutive rolls.
Our answer is E.
As in, "Eye in the sky."