in how many ways can 5 boys of which two are identical twins be arranged in a circle?
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Step-by-step explanation:
The formula for the number of ways to arrange 'n' different things in a circle= (n-1)!
It is (n-1)! and not n! because in a circle, you can get n different arrangements, that when rotated, turn out to be the same arrangement.
However, here since two boys are identical we shall further divide it by 2!
Hence, the answer is 4!/2! = 12.
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