anonymous
  • anonymous
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?
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
@marigirl
AkashdeepDeb
  • AkashdeepDeb
Alrighty! Do you know what a sample space is?
anonymous
  • anonymous
no

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AkashdeepDeb
  • AkashdeepDeb
|dw:1389785917308:dw|
AkashdeepDeb
  • AkashdeepDeb
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
anonymous
  • anonymous
The third one = 1 - (a) - (b)
marigirl
  • marigirl
Yes I agree with the ans, kryton1212 does that make sense?
anonymous
  • anonymous
thanks all

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