How many proper subsets does a, b, c, d have?

  1. 4
  2. 8
  3. 16
  4. 15
Answer

D) 15

There are 2^4 = 16 subsets; leaving out the set itself gives 15 proper subsets. SLO M-09-A-11 · Application

Mathematics MCQ · More Sets and Functions MCQs · Practise