Question

how to find permutations of an array when it contains similar elements

Answer 1

Thank you for asking this question. This question is really easy to solve.
Its really simple to find the permutations. You just have to count how many elements their are in the array and then count how many elements are similar in the array.
Then just divide the factorial of the total no. of elements over factorial of similar no. of elements.
I hope this answer can help you in some manner.