In how many ways can $5$ red and $4$ white balls be drawn from a bag containing $10$ red and $8$ white balls?

Find the number of ways of selecting $4$ pens and $3$ pencils from a packet of $8$ pens and $5$ pencils.

$\binom{n}{r} \div \binom{n}{n-1} = \dots$

In a touring cricket team,there are $16$ players in all,including $5$ bowlers and $2$ wicket-keepers. How many teams of $11$ players can be chosen from these,such that the team includes exactly $3$ bowlers and $1$ wicket-keeper?

In how many ways can Rs. $16$ be divided among $4$ persons if none of them gets less than Rs. $3$?

If a person has $3$ coins of different denominations,the number of different sums that can be formed is