Question

Find the rank of the word BANANA..

Question of Permutation and Combination class 11​

Answer 1

Answer:

Let us arrange as AAABNN

Words starting with A is 5!/2! 2! = 30

Words starting with B is 5!/3! 2! = 10

Words starting with BAA is 3!/2! = 3

Words starting with BAN can be done in 2 ways, that is BANANA and BANAAN = 2

Therefore 30 + 3+ 2 = 35 ways

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