AP EAMCET2011MathematicsPermutation and Combination
¹⁵ P₈=A+8 ¹⁴ P₇ A=
Options
- A¹⁴ P₆
- B¹⁴ P₈
- C¹⁵ P₇
- D¹⁶ P₉
Correct answer
B. ¹⁴ P₈
Step-by-step solution
aligned & Given, ¹⁵ P₈=A+8 ¹⁴ P₇ & 15 ! 7 ! =A+8 14 ! 7 ! & A= 14 ! 7 ! (15-8)= 14 ! 7 ! (7) & = 14 ! 6 ! = ¹⁴ P₈ & aligned