Question

11pr=12pr-1 solution??​

Answer 1

Step-by-step explanation:

12pr - 1 = 11pr

12pr - 11pr = 1

pr = 1

p=1/r or r=1/p

Answer 2

Answer:

r=9. but,r>n in nPr is meaningless.

Step-by-step explanation:

for explanation please see the attachment.

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