Question 238631: Classical probability. How many possible outcomes exist when rolling two fair dice? What is the probability of rolling a 7? An 11? How did you determine your answers?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Classical probability. How many possible outcomes exist when rolling two fair dice? What is the probability of rolling a 7? An 11? How did you determine your answers?
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Draw a 6 by 6 square.
Call the rows: 1,2,3,4,5,6
Call the columns: 1,2,3,4,5,6
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Write the sum of each row name and the corresponding column name
in the 36 separate row/column pairs.
You should get:
1st row: 2,3,4,5,6,7
3nd row; 3,4,5,6,7.8
...
...
6th row;7,8,9,10,11,12
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There are 36 entries
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There are six 7's in the square so probability of
rolling a seven is 6/36 = 1/6
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There are two 11's in the square so probability of
rolling an eleven is 2/36 = 1/18
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Cheers,
Stan H.
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