A probability problem by pulkit singh
Probability
Level
2
The number of words that can be formed by using letters of word MATHEMATICS that start as well as end with T is
The answer is 90720.
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1 solution
the word mathematics contain 11 letters now 'T' is fixed at 1st and last position so we have only 9 letters left to permute i.e. - 9! But we have two'A' and two 'm' so we have to divide it by two times 2! i.e. - 9!/2!2! = 90720 that is the answer... 😊