Question

In how many ways is it possible to draw a sum of money from a bag containing a sovereign, a half-sovereign, a crown, a florin, a shilling, a penny, and a farthing?

Answer 1

$⟹$ We know that total number of selection of ${}^{\prime }{n}^{\prime }$ different things is equal to $2^n$, if blank case is allowed.
and $2^n-1$ if blank case is not allowed.
$\therefore$ Total number of ways to draw a sum of money (blank case excluded) is
$=2^7-1$
$=127$