- #1
phoenixy
I had been thinking about this one for awhile now but somehow couldn't come up with anything
Q: Number of ways to select nine 9 marbles from a bag of twelve, where 3 are red, 3 are green, 3 are white, 3 are blue
This question is in the inclusion & exclusion section(but I can't figure out how it's related to I & E..)
any suggestion?
Q: Number of ways to select nine 9 marbles from a bag of twelve, where 3 are red, 3 are green, 3 are white, 3 are blue
This question is in the inclusion & exclusion section(but I can't figure out how it's related to I & E..)
any suggestion?