Here's the question you clicked on:
kryton1212
Two fair dice were rolled once. (a) What is the probability of getting a sum of 7? (b) What is the probability of getting a sum greater than 7? (c) Using (a) and (b), what is the probability of getting a sum less than 7?
Alrighty! Do you know what a sample space is?
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I'll help you solve the second question! If you see, they ask how many are greater than 7. Let's see, 6,2 5,3 4,4 3,5 2,6 6,3 5,4 4,5 3,6 6,4 5,5 4,6 5,6 6,5 6,6 And that is 15 possibilities out of a total 36. So Probability = \(\frac{Possible Outcomes}{Total Outcomes} = \frac{15}{36} = \frac{5}{12}\) Now I guess you can do the first and the third one similarly! Got it? :D
The third one = 1 - (a) - (b)
Yes I agree with the ans, kryton1212 does that make sense?