SOLUTION: Suppose 9 cards are numbered with the 9 digits from 1 to 9. A 3-cards hand is dealt ,1 card at a time .How many hands are possible where: a) Order is taken into consideration? b)

SOLUTION: Suppose 9 cards are numbered with the 9 digits from 1 to 9. A 3-cards hand is dealt ,1 card at a time .How many hands are possible where: a) Order is taken into consideration? b)

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Question 364047: Suppose 9 cards are numbered with the 9 digits from 1 to 9. A 3-cards hand is dealt ,1 card at a time .How many hands are possible where:
a) Order is taken into consideration?
b) Order is not taken into consideration?
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
a)
nPr=n!/(n-r)!
9P3=9!/6!=504
.
b)
nCr=n!/((n-r)!r!)
9C3=9!/(6!*3!)=84
.
Ed

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