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Luda [366]
2 years ago
11

A stack of 9 different cards are shuffled and spread out face down. If 4 cards are tired face up, how many different 4-card comb

inations are possible?
Mathematics
1 answer:
Juliette [100K]2 years ago
7 0

Answer:

126.

Step-by-step explanation:

This is the number of combinations of 4 cards  from 9 cards:

= 9C4

= 9! / 4! 5!.

A quick way of calculating this is  

9*8*7*6

----------- =   9*2*7   =    126 combinations.

4*3*2*1

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2 years ago
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Step-by-step explanation:

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Step-by-step explanation:

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