Question: Find the number of ways of arranging the letters of the word SHIPPING, so that the two P’s are together and the two I’s are together.
Options:
A) 360
B) 120
C) 720
D) 460
Show Answer
Answer:
Correct Answer: C
Solution:
- There are 8 letters in the given words shipping in which two P’s are alike and two I’s are alike. By taking two P’s as 1 unit and two I’s as another unit and the rest all different we have total 6 different units. These can be arranged in 6 ways
$ =6\times 5\times 4\times 3\times 2\times 1=720 $
Since, two I’s can be arranged among themselves in one way and two P’s can be arranged in one way.
$ \therefore $ Required arrangement $ =6!,\times 1\times 1 $
$ =720\times 1\times 1=720 $ ways