anonymous
  • anonymous
Two dice are thrown. If each face is equally likely to turn up, find the probability that the sum is at least 7. (Write your answer as a fraction.)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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Directrix
  • Directrix
Directrix
  • Directrix
Let's count. Look at the chart showing the sample space for tossing a pair of dice. You want a sum of at least 7. The sums of 7 are ringed in red. Follow the sums down the right to left diagonals. 6 ways to get a sum of 7 5 ways to get a sum of 8 4 ways to get a sum of 9 3 ways to get a sum of 10 2 ways to get a sume of 11 1 way to get a sum of 12. Notice the cool pattern. 21 ways to get a sum greater than or equal to 7.
Directrix
  • Directrix
P(at least a sum of 7) = 21/ 36. That simplifies to 7/12. 36 is the number of outcomes of tossing a pair of dice: 6 ways for the first and 6 for the second = 36.

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anonymous
  • anonymous
i swear i just answered this one...

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