19. 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?

Explanation

We know that total number of selection of ′n′ different things is equal to` 2^n`, if blank case is allowed.

and `2^n−1` if blank case is not allowed.

so, Total number of ways to draw a sum of money (blank case excluded) is


=`2^7−1`

=`127`