Nine different letters are to be dropped in three different letter boxes. In how many different ways can this be done?
Nine different letters are to be dropped in three different letter boxes. In how many different ways can this be done?
(a) 27 (b) 39 (c) 92 (d) 39 –3
7 views
1 Answers
(b) First letter can be dropped into any of the 3 boxes. It can be done in 3 ways. Similarly second letter can also be dropped into any of the 3 boxes in 3 ways and so on. Hence, total no of ways = 3×3×3×.........upto 9 times = 39
7 views
Answered