How many arrengements can be made by taking four letters of the word `MISSISSIPPI ?`

How many arrengements can be made by taking four letters of the word MISSISSIPI?

How many arrangements can be made of the letters of the word 'ARRANGEMENT'?

How many arrangements can be made out of the letters of the word 'ENGINEERING'?

How many different words can be formed by jumbling the letters of the word ‘MISSISSIPPI in which no two S are together ?

How many different words can be formed by jumbling the letters of the word 'MISSISSIPPI' in which no two S are together ?

How many different words can be formed by jumbling the letters in the word MISSISSIPPI in which no two S are adjacent?