Saved Bookmarks
| 1. |
4 In how many ways can 6 letters be posted in 5letter boxes? |
|
Answer» Step-by-step explanation: 1: We take a letter. It can be posted in any of the 4 boxes. Similarly, next letter can be posted in 4 ways, and so on. Total number = 45. ANSWER 2: AMONG the total number of positions of 5 LETTERS and 3 dividers (between 4 boxes), positions of 3 dividers can selected in (83) ways. Which one is correct (I think the first one)? Why is the other one WRONG and how does it differ from the right answer in logical/combinatorial PERSPECTIVE? |
|