(a(i))[2]
Find how many numbers can be made if digits are not repeated.
(a(ii))[3]
Find how many numbers can be made if digits can be repeated and the number formed is odd.
(b(i))[2]
A box of $20$ biscuits contains $4$ different chocolate biscuits, $2$ different oatmeal biscuits and $14$ different ginger biscuits. $6$ biscuits are selected from the box at random. Find the number of different selections that include the $2$ oatmeal biscuits.
(b(ii))[4]
Find the probability that fewer than $3$ chocolate biscuits are chosen.