Question

In how many ways the letters of the word ‘minimum' be arranged taking all the letters?

Answer 1

420

Explanation:  

MINIMUM contains 7 letters, so total 7! ways. But it contains 2 I’s and 3 M’s so divide by 2! And 3!

So ways 7!/(2! * 3!) = 7*6*5*4*3*2*1 / 2*1*3*2*1 = 420

plz tell me if this is wrong ...