Question

Find the number of distinguishable permutations of 6 D’s 5 F’s and 2 K’s

Answer 1

36036 permutations

Explanation:

(6+5+2)!/(6! * 5! * 2!)

13!/(6! * 5! * 2*1)

(13*12*11*10*9*8*7)/(5*4*3*2*1*2*1)

(13*12*11*10*9*8*7)/(10*12*2)

(13*11*9*8*7)/2

(13*11*9*4*7)

36036 permutations