There are five comics numbered from 1 to 5. In how many ways can they be arranged, so that part-1 and part-3 are never together?
A. 48
B. 72
C. 120
D. 210
Answer: Option B
Solution(By Examveda Team)
The total number of ways in which 5 part can be arranged =5! =120. The total number of ways in which part-1 and part-3 are always together: = 4! × 2!= 48 Therefore, the total number of arrangements, in which they are not together is: = 120 - 48
= 72
This Question Belongs to Arithmetic Ability >> Permutation And Combination
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