Question

the number of ways of forming a garland using 21 different flowers is​

Answer 1

Answer:

21 different ways of forming a garland

Answer 2

Answer:20!/2

Step-by-step explanation:

Total no. of ways in which a garland can be made of n things is  

(n−1)!  /2

∴ no. of different garlands =   2 1

(21−1)!/2 => 20!/2  

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