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If D = {1, 2, 3, 4, 5, 6}, how many subsets contain exactly 3 elements?

Practice Questions

1 question
Q1
If D = {1, 2, 3, 4, 5, 6}, how many subsets contain exactly 3 elements?
  1. 20
  2. 30
  3. 40
  4. 50

Questions & Step-by-step Solutions

1 item
Q
Q: If D = {1, 2, 3, 4, 5, 6}, how many subsets contain exactly 3 elements?
Solution: The number of ways to choose 3 elements from a set of 6 is given by the combination formula C(n, r) = n! / (r!(n-r)!). Here, C(6, 3) = 20.
Steps: 0

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