Math, asked by mohammadajaz658, 2 months ago

if 5pr = 2, 6pr-1 find r​

Answers

Answered by bsbuntysoni25
0

Answer:

question is :

5

P

r

=2

6

P

r−1

nPx

=

(n−x)!

n!

(5−r)!

5!

=2×(7−r)!

6!

(7−r)(6−r)=4×3

r=3

Answered by Datthu56
0

Answer:

r=3

Step-by-step explanation:

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