Question

nP3 : nP2 =3 : 1 then n is equal to​

Answer 1

Answer:

n is equal to 5

step-by-step explanation:

Concept:

\bf\;^nP_r=n(n-1)(n-2)..........r\;factors

Given:

^nP_3:\;^nP_2=3:1

\implies\displaystyle\frac{^nP_3}{^nP_2}=\frac{3}{1}

\implies\displaystyle\frac{n(n-1)(n-2)}{n(n-1)}=3

\implies\;n-2=3

\implies\;n=3+2

\implies\boxed{\bf\;n=5\}

Answer 2

Here is your answer.....