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Emily chooses a nubmer from 1 to 10 at random, and Juan does the same.  What is the probability that the sum of their numbers is less than 10?

 May 18, 2020
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If you made a 10  x  10  ADDITION table, you should get 100 sums. if you count the sums that are < 10, you should get 36. Therefore, the probability is: 36 / 100 =9 / 25

 May 18, 2020

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