Question 1127578
the subsets of the set A={a,b,c,d} are:

{} , {a} , {b} , {c} , {d} ,{a, b} , {a, c} , {a, d} , {b, c} , {b, d} , {c, d} , {a, b, c} , {a, b, d} , {a, c, d} , {b, c, d} , {a, b, c, d} (total: 16)