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The number of words that can be formed by using the letters of the words MATHEMATICS that start as well as end with T is

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Solution: The word MATHEMATICS contains 11 letters viz.

M,M,A,A,T,T,H,E,I,C,S . The number of words that begin with T and end with T is

\ 9!/2!2!=90720

 

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Deependra Verma

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