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kryton1212

  • 11 months ago

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?

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  1. kryton1212
    • 11 months ago
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    @marigirl

  2. AkashdeepDeb
    • 11 months ago
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    Alrighty! Do you know what a sample space is?

  3. kryton1212
    • 11 months ago
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    no

  4. AkashdeepDeb
    • 11 months ago
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    |dw:1389785917308:dw|

  5. AkashdeepDeb
    • 11 months ago
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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

  6. RolyPoly
    • 11 months ago
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    The third one = 1 - (a) - (b)

  7. marigirl
    • 11 months ago
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    Yes I agree with the ans, kryton1212 does that make sense?

  8. kryton1212
    • 10 months ago
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    thanks all

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