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6.Permutation and Combination
hard
The total number of different combinations of one or more letters which can be made from the letters of the word ‘$MISSISSIPPI$’ is
A
$150$
B
$148$
C
$149$
D
None of these
Solution
(c) Here we have $1\;M,\;4\;I,\;4\;S$ and $2P$.
Therefore total number of selections of one or more letters $ = (1 + 1)(4 + 1)(4 + 1)(2 + 1) – 1 = 149$.
Standard 11
Mathematics
