SOLUTION: Ten cards are numbered from 1-10. Three different cards are selected at random from these cards. What is the probability that the sum of the numbers is at most 9?. Th

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Question 856942: Ten cards are numbered from 1-10.
Three different cards are selected at random from these cards.
What is the probability that the sum of the numbers is at most 9?.
Thank you.

Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 
Hi,
3 cards sum at most 9
1, 2, 3
1, 2, 4
1, 2, 5
1, 2, 6
Select 3 different cards from Ten cards numbered from 1-10.
P(sum ≤ 9) = = 4/120 = 1/30
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