Question 287835: If you roll a pair of numbered cubes, each with the digits 1 through 6, what is the probability of rolling a sum of 7?
a 1/6 b 1/12 c 7/12 d 1/36 e 7/36
Answer by Grinnell(63)   (Show Source):
You can put this solution on YOUR website! The answer is one over 6 or 1/6.
Remember your multiplication table?
Now listen carefully. We are going to have as a paradigm a Dice probability table.
Go across write (space it out) 1 thru 6.
Now go down, 1 thru 6.
Now you have something similar to the frame of a multiplication table.
Now fill in...
1 2 3 4 5 6
1 1,1 1,2 1,6
2 2,1 2,2 2,5
3 3,1 3,2 3,4
4 4,3
5 5,2
6 6,1
Fill all these in. Fill ALL of these in. I did the obvious for you. Learn this new paradigm (table) when dealing with dice!!!!!!!!! 1/6 is the answer---the table yields 36 entries. Complete this table!!!!!!!! The table DID NOT TURN OUT AT ALL. BUT DO A MULTIPLICATION-LIKE TABLE .
|
|
|
