Posted by Student on Wednesday, April 16, 2008 at 3:10pm.
The colors red, orange, green, blue, indigo, and violet are written on slips of paper and placed in a hat. What is the probability that the slips will be chosen in the order of the colors of a rainbow (the order listed above)

ALGEBRA  Reiny, Wednesday, April 16, 2008 at 3:15pm
The colours can be arranged in 6! or 720 ways.
The above order is one of these.
So the prob of that particular order is 1/720

ALGEBRA  Student, Wednesday, April 16, 2008 at 3:29pm
my book says 1/5040
could you tell me how to get it

ALGEBRA  msp, Wednesday, April 16, 2008 at 3:34pm
I think you may have forgotten one of the colors...yellow. There are 7 colors in the rainbow, so it would be 7! or 7x6x5x4x3x2x1 which would give you 5040.

ALGEBRA  Student, Wednesday, April 16, 2008 at 3:36pm
youre my new bestfriend
thanks msp!
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