AP EAMCET202125 Aug 2021Morning ShiftMathematicsPermutation and CombinationActual
The value of ^7 P₃-3 ( ^6 P₂ ) is equal to
Options
- A^7 P₂
- B60
- C^6 P₃
- D240
Correct answer
C. ^6 P₃
Step-by-step solution
We have, array ll & ^7 P₃-3 ^6 P₂ & 7 ! 4 ! -3 6 ! 4 ! & 7 ! 4 ! - 3 6 ! 4 ! & = 6 ! 4 ! (7-3)= 6 ! 4 ! 4 & = 6 ! 4 4 3 ! = 6 ! 3 ! = ^6 P₃ array