Question

Identify 12P1 using factorials

a. 12!/13!
b. 12! times 11!
c. 12!/11!
d. 12!/1!
pls look at the pic

Answer 1

Ans. Correct option in (c) 12!/11!

we know that

the formula of nPr is n! / (n−r)!.

in this question

n = 12 and r = 1

so putting values we get ,

= 12! / (12-1)!

= 12!/11!