Question

plss solve this question

Answer 1

Answer:

r=2

Step-by-step explanation:

4*⁶Pr=⁶Pr+1

or, 4*6!/(6-r)!=6!/(6-r-1)

4/(6-r)! =1/(6-r-1)

(6-r)!=4*(6-r-1)!

(6-r)(6-r-1)! = 4*(6-r-1)!

6-r=4

r=6-4=2

r=2