Question 978044: If you have a box of 12 marbles of 3 different colors, blue, green and red, 4
blue, 4 green, 4 red. How many ways can you draw two balls of the same color?
Answer by Edwin McCravy(20055)   (Show Source):
You can put this solution on YOUR website! If you have a box of 12 marbles of 3 different colors, blue, green and red, 4
blue, 4 green, 4 red. How many ways can you draw two balls of the same color?
4C2+4C2+4C2 = 3*(4C2) = 3*(4*3)/(2*1) = 3*12/2 = 3*6 = 18
1. (b1,b2)
2. (b1,b3)
3. (b1,b4)
4. (b2,b3)
5. (b2,b4)
6. (b3,b4)
7. (g1,g2)
8. (g1,g3)
9. (g1,g4)
10. (g2,g3)
11. (g2,g4)
12. (g3,g4)
13. (r1,r2)
14. (r1,r3)
15. (r1,r4)
16. (r2,r3)
17. (r2,r4)
18. (r3,r4)
Edwin
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