Question
Question: 6 letters are to be posted in three letter boxes. The number of ways of posting the letters when no ...
6 letters are to be posted in three letter boxes. The number of ways of posting the letters when no letter box remains empty is
A
270
B
540
C
537
D
728
Answer
540
Explanation
Solution
No. of ways = 36 – 3C1 26 + 3C2 = 540