Write the number of proper subsets of the set A = {a,b,c,d}

The number of proper subsets of the set {a,c,I,o,u} are:

The number of subsets of the set {a, b} is :

Find the number of r-subsets of the set S = {1, 2,.......,4} that do not contain a pair of consecutive integers.

The number of subsets of the set{1,2,4} is:

The number of subsets of the set {1, 2, 3} is:

Write the proper subsets of {2,4,6}

Write the proper subsets of {1,2,3}

Write the proper subsets of {1,3,5}

The number of subsets of the set (a, e, i, o, u} is: