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brilliants [131]
3 years ago
15

Mack plans to meet his 4 friends. How many different ways can he make his visit if he visits each friends once?

Mathematics
1 answer:
Galina-37 [17]3 years ago
4 0

Answer:

  24

Step-by-step explanation:

Mack can choose any of the 4 for the first visit, any of the remaining 3 for the second visit, either of the remaining 2 for the third visit, then visit the last one. There are 4·3·2·1 = 24 ways Mack can do this.

_____

The number 4·3·2·1 is "four factorial", written as 4! (with an exclamation point). It is the number of ways 4 objects can be ordered, called the number of <em>permutations</em> of 4 objects.

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