If $m$ rupee coins and $n$ ten paise coins are placed in a line, then the probability that the extreme coins are ten paise coins is
If $m$ rupee coins and $n$ ten paise coins are placed in a line, then the probability that the extreme coins are ten paise coins is
- A
$^{m + n}{C_m}/{n^m}$
- B
$\frac{{n\,(n - 1)}}{{(m + n)\,(m + n - 1)}}$
- C
$^{m + n}{P_m}/{m^n}$
- D
$^{m + n}{P_n}/{n^m}$
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