On simplification, the expression 5n+2−6×5n+113×5n−2×5n+1 equals
(a)53 (b)−53 (c)35 (d)−35
Find the value of nC0 4 + 42 × nC12 + ......... 4n+1n+1 × nCn
The set builder form of " A is the set of the whole numbers which are divisible by 5 and are less than 7" is