How many words can be formed by using all letters of the word ‘BEIJING’ ?	Choose the correct choice from the following options:
A) 4050
B) 720
C) 120
D) 5040
E) 770
Solution   The word BEIJING contains 7 different letters.   Required number of words = 7P7 = 7 ! = (7 x 6 x 5 x 4 x 3 x 2 x 1) = 5040   Answer 5040
<result>D</result>
How many words can be formed by using all letters of the word ‘BEIJING’ ?