Question

How many 4 letter words can be formed using letters in the word MADHURI if letters cannot be repeated?

Answer 1

When repetition of letters is not allowed, the number of 4-letter words formed from the letters of the word MADHURI is

∴ ⁷P₄ = `(7!)/((7-4)!)=(7xx6xx5xx4xx3!)/(3!)` = 840
∴ 840 four-letter words can be formed when the repetition of letters is not allowed.