#Arrange the Letters
Level
pending
In the class, the teacher discussed all about probability. They discussed about Permutation. On the board, the problem is written.
How many permutations will be made from the letters of the famous word DISSIMILAR?
Note: the common formula for permutation is nPr. it differs on the conditions.
502, 401
302, 405
300,896
302, 400
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1 solution
nPr1,r2,r3,...rk = 10!/1! 3! 2! 1! 1! 1! 1!
nPr1,r2,r3,...rk =10 9 8 7 6 5 4 3 /3!*2! =302, 400 permutations