Question 1

Two dice are rolled. What is the probability [tex]P(\text{sum is 12})[/tex]? Express your answer as a decimal (rounded to 4 places) or a reduced fraction.



Answer :

Sure, let's work through this step-by-step.

1. Determine the total number of outcomes when two dice are rolled:
- Each die has 6 faces numbered from 1 to 6.
- When rolling two dice, the total number of possible outcomes is the product of the number of faces on each die.
[tex]\[ \text{Total outcomes} = 6 \times 6 = 36 \][/tex]
So, there are 36 possible outcomes when rolling two dice.

2. Identify the favorable outcomes where the sum is 12:
- To get a sum of 12, both dice need to show a 6 since [tex]\(6 + 6 = 12\)[/tex].
- There is exactly one combination (6, 6) that adds up to 12.
[tex]\[ \text{Favorable outcomes} = 1 \][/tex]

3. Calculate the probability:
- Probability is defined as the number of favorable outcomes divided by the total number of possible outcomes.
[tex]\[ \text{Probability} = \frac{\text{Number of favorable outcomes}}{\text{Total number of possible outcomes}} = \frac{1}{36} \][/tex]

4. Express the probability as a decimal and round to 4 decimal places:
- Converting the fraction [tex]\(\frac{1}{36}\)[/tex] to a decimal:
[tex]\[ \frac{1}{36} \approx 0.027777\ldots \][/tex]
- Rounding to 4 decimal places, we get:
[tex]\[ \text{Probability} \approx 0.0278 \][/tex]

In summary, the total number of outcomes when two dice are rolled is 36. There is only 1 favorable outcome where the sum of the two dice is 12. The probability of rolling two dice and getting a sum of 12 is 0.0278 when rounded to 4 decimal places.