Let $A$ be a sequence of $8$ distinct integers sorted in ascending order. How many distinct pairs of sequences, $B$ and $C$ are there such that
answer - C
select any $3$ elements from given $8$ elements - $^8C_3$
8C5 = 8C3
picking 3 elemts and picking 5 elements means same thing , rt ?
why its not 8C3+ 8C5
as we have two way to do it
1) Pick element for B first then C = 8C5 * 3C3= 8C5
2)Pick element for C first then B = 8C3 * 5C5= 8C3
@arjun sir "We have to find no of distinct sequences. "
could u plz explain this ?what does it mean