MCQ
${ }^n P_r$ નું સૂત્ર જણાવો.
  • ${ }^n P_r={ }^n C_r \times r$ !
  • B
    ${ }^n P_r=\frac{{ }^{ n } C_r}{ r !}$
  • C
    ${ }^n P_r=\frac{( n - r )!}{ n !}$
  • D
    ${ }^n P_r=n(n-1)(n-2) \ldots .(n+r-1)$

Answer

Correct option: A.
${ }^n P_r={ }^n C_r \times r$ !

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free